For gaming, just get the i5-3570k, there's no performance difference between the two in gaming, also a xeon is a bad idea for it, just get the i5-3570K and the ssd.
But i rather get a better one, the samsung 840 has tlc nand which is inferior to the top ssds out there, check for a plextor M5S like this one : http://www.microcenter.com/product/398905/M5s_PX-128M5S...(SSD)_with_Marvell_88SS9174_Controller
For current gaming, the i5-3570k is as much as you need (it's what I just bought yesterday... ). The current games really don't take advantage of the multi-threading that the i7 would give you. It's more for people doing 3D rendering and things of that nature, that require a LOT of computing power. That said, it's not unreasonable to think that games will eventually catch up and the i7 would be the better choice.
Now, I want to mention if you're near a microcenter, they have an awesome deal until 2/10 for the i5-3570k for $189 and $50 off some MOBOs. I got the ASRock z77 extreme4 and the 3570k for $290 after tax, plus a $10 MIR. Pretty sweet deal.
Also, if you think the i7 would future proof you, you could always get that, and add the SSD later. Personally, I wouldn't try planning for the future, because with computers you can only plan for now (as I've heard/read on several occasions). Get the i5, the SSD and rock out!
SandForce controller with Toggle DDR NAND (Mushkin Chronos Deluxe, Patriot Wildfire, OCZ Vertex 3 Max IOPS, OWC Mercury Extreme Pro 6G, Corsair Force GS)
Samsung 840 250 GB
Samsung 830 SSD 256 GB
Plextor M3 Pro 128 GB/256 GB
OCZ Vertex 4 512/256 GB
OCZ Vector 512/256 GB
Samsung 840 Pro 128 GB/256 GB
Or.... if the expense is troubling, a hybrid SSD / HD provides a level of performance that is hard to discern from a SSD w/o a stopwatch or benchmark program. For example, an SSD boots about 1 second faster than a hybrid.
So i found a sale for an i7 3770 k for $230 bucks. Or should i go with an Samsung 840 series 120 GB with an i5 3570 k.
Which choice should i go for, which will give me a better boost in speed and overall performance, for gaming purposes.
You won't need an i7, nor would you notice a difference in many games.
The power of an i5 is often underestimated, i consider the i5 as the very same thing as an i7 w/out "Hyper threading". In the end I would go with an SSD but just not with the Samsung 840. I would much rather prefer the Kingston hyperX, OZC Vertex Series or Adata SSD's because they are better (from experience) and cheaper for the
120-128 GB range
The i5-3570k is what you need for gaming, either for now or in the future, some games might use the ht in the future, but it's just speculation, for now there's no difference with ht, some games even run worse with it, besides there's always gonna be better cpus in the future, buy what you need as of it now, which is the i5.
For the ssd, since you're going to a microcenter store, get the plextor m5s 128GB, it's as reliable as the samsung 830 or ocz vector and it's much more cheaper.
This one : http://www.microcenter.com/product/398905/M5s_PX-128M5S...(SSD)_with_Marvell_88SS9174_Controller
Now, if you buy a 3570k processor. You'll regret you did not bought a 3770k or Intel Xeon after about in a year. Then you would need the features that are only i7 processors and xeon¨s.
For SSD I would recommend also Samsung 830/840Pro or OCZ Vector. Intel 520 is very reliable.
Xeons are not gaming CPU's they do not perform anywhere near as well as say an i5. Xeons are better put in a server enviroment and the 3570K will serve it's purpose for a much better price. In the next few years games could "MAYBE" utilize all hyperthreading and all of that fun stuff, but as someone wisely said, it's better to buy stuff for now, not for the future. Especially when buying for the future will leave you broke and with newly outdated hardware.