[Solved] Pick Case, PSU, HeatSink, HDD, SSD for my setup

Hi Guys,
I am finally building another desktop after 5 years (so I m a bit rusty!!) I have done some research for the past week to get myself up to speed on latest and greatest - and this site is really awesome!!! I m trying to build a nice PC or at least nice base so I can easily keep adding to it as I go along.. Here is what I have so far:
ASUS P8P67 Deluxe
i5 2500K
Ripjaws X DDR3 1600 (8GB)
XFX HD-567X-ZNF3 Radeon HD 5670 1GB 128-bit DDR5

I will be using this machine for programming/multitasking for now with mild gaming so I m not concerned with the Graphic card (Plz suggest a better one for < $80 if possible)
I need help deciding on a Case, PSU, and heatsink (I m thinking of OC to 4.5Ghz) to keep my system cool.
For now I might not need much power or cooling but I might in the future so I would like to have the system ready for future upgrades..
I also need some help picking up a Hard disk? which ones should I pick that works nice with this setup?
My budget is about ~$400 for these.

On a side note.. should I invest in an SSD? which one? i might be able to squeeze an extra ~150 for that.

I really need to build this ASAP so I wud really appreciate quick responses.

Thanks guys.

What about the HAF912 thats what im planning For my next build
http://www.newegg.com/Product/Prod [...] 6811119233

the haf 912 is a good choice too but the haf 922 has plenty of room should one want to put in one of the longer graphics cards available

I think I m gonna go with HAF 922 because it has plenty of room and it might last a while as I add more parts.

For PSU as I add a better graphic card wont I need the extra power (550 vs 650) and I think I'd rather go with Corsair or Antec.. any suggestions?

For HeatSink: I read a lot of ppl are going with COOLER MASTER Hyper 212 Plus
http://www.newegg.com/Product/Prod [...] 212%20plus
any thoughts?

For HDD: I never used Samsung for HDD I usually get WD and had great luck with them.. any suggestions for WD HDD?

Thanks for quick responses..

I prefer WD too but they are like $10 more than the Spinpoints. WD has 5 year warranty opposed to Samsungs 3 and the WD drives perform a tiny bit better but I don't think enough to notice. If you go with a WD drive go with a black series one, something like this: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136319

Since the ASUS mobo supports SATA III 6Gb/s shouldnt I got with a 6Gb/s vs 3Gb/s harddrive? Is there a big difference?
Here is the HDD I m looking at:
Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s
http://www.newegg.com/Product/Prod [...] 6822136533