Good gaming motherboard?

For a designing program like Photoshop and for gaming a i5 4670K would still do perfectly.
But, for 3d rendering and more intense games then a i7 4770K would be more beneficial.
For the motherboard try these:

Option 1:
http://www.asus.com/Motherboards/Z87PRO/
Option 2:
http://www.msi.com/product/mb/Z87GD65_GAMING.html#overview
Option 3:
http://www.asus.com/Motherboards/MAXIMUS_VI_HERO/

The difference between the three are that the Z87 Pro has built in wifi, the maximus vi hero and msi z87 gd65 have better sound output.
So honestly, any of those will do nicely for your needs.
Hope this helps!

Honestly there's not a lot of difference between them.
The newer one (Z97) will allow you to upgrade to a 5th generation broadwell CPU when its released later in life.
Leaving your options open for the future.
Hope this helps!

For gaming, a i5-4670K will perform exactly as well as a i7 and be $100 cheaper.
That allows you to budget more for a stronger graphics card that is the real engine of a gamer.
For photoshop, buy the full complement of 16gb of ram.

On the motherboard, they are all good. I would buy a current gen Z97 based motherboard.
In particular, do not spend extra on fancy sli capable motherboards unless you are planning on triple monitor gaming or will use a 4k monitor.
Here is my canned rant on planning for dual cards:
-----------------------------Start of rant----------------------------------------------------
Dual graphics cards vs. a good single card.

a) How good do you really need to be?
A single GTX650/ti or 7770 can give you good performance at 1920 x 1200 in most games.

A single GTX660 or 7850 will give you excellent performance at 1920 x 1200 in most games.
Even 2560 x 1600 will be good with lowered detail.
A single gtx690,7990, GTX780ti or R9-290X is about as good as it gets for a single card.

Only if you are looking at triple monitor gaming, or a 4k monitor, might sli/cf will be needed.
Even that is now changing with triple monitor support on top end cards and stronger single card solutions.

b) The costs for a single card are lower.
You require a less expensive motherboard; no need for sli/cf or multiple pci-e slots.
Even a ITX motherboard will do.

Your psu costs are less.
A GTX660 needs a 430w psu, even a GTX780 only needs a 575w psu.
When you add another card to the mix, plan on adding 200w to your psu requirements.

Even the most power hungry GTX690 only needs 620w, or a 7990 needs 700w.

Case cooling becomes more of an issue with dual cards.
That means a more expensive case with more and stronger fans.
You will also look at more noise.

c) Dual gpu's do not always render their half of the display in sync, causing microstuttering. It is an annoying effect.
The benefit of higher benchmark fps can be offset, particularly with lower tier cards.
Read this: http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html

d) dual gpu support is dependent on the driver. Not all games can benefit from dual cards.

e) dual cards up front reduces your option to get another card for an upgrade. Not that I suggest you plan for that.
It will often be the case that replacing your current card with a newer gen card will offer a better upgrade path.
The high end Maxwell and amd 8000 or 9000 series are due the end of the year or next year.
-------------------------------End of rant-----------------------------------------------------------

If you will be gaming on a single 1080P monitor, the GTX770 will do the job.
But... since you have the budget, go ahead and look at the GTX780. Even spend a bit extra on a superclocked version.

I would not buy a liquid cooler; spend your money elsewhere.
My canned rant on liquid cooling:
------------------------start of rant-------------------
You buy a liquid cooler to be able to extract an extra multiplier or two out of your OC.
How much do you really need?
I do not much like all in one liquid coolers when a good air cooler like a Noctua NH-D14 or phanteks can do the job just as well.
A liquid cooler will be expensive, noisy, less reliable, and will not cool any better
in a well ventilated case.
Liquid cooling is really air cooling, it just puts the heat exchange in a different place.
The orientation of the radiator will cause a problem.
If you orient it to take in cool air from the outside, you will cool the cpu better, but the hot air then circulates inside the case heating up the graphics card and motherboard.
If you orient it to exhaust(which I think is better) , then your cpu cooling will be less effective because it uses pre heated case air.
And... I have read too many tales of woe when a liquid cooler leaks.
google "H100 leak"
-----------------------end of rant--------------------------

The hyper212 is a very good value cooler at $30.
There are others of the same tower type with slow turning 120mm fans. Look at Xigmatek.

I particularly like noctua but they are a bit more expensive. Their fans are superb and quiet.
The mounting method is simplicity itself.

The very best might be the new NH-D14 at $80. It is massive, but fits on any motherboard.
A caveat is to buy low profile ram so the cooler fans will clear the ram.
An in between option might be the Noctua NH-U14S
http://www.newegg.com/Product/Product.aspx?Item=N82E16835608041
The 140mm fan will be inaudible when you use one of the low noise adapter that noctua supplies.