Originally Posted by xd_1771
^ And at the same time he has no room to get extra graphics horsepower via a second card due to the limited nature of the CX 430 V2. There is no hard drive in this PC. To top it off everything goes over budget discounting the rebates which I normally do not consider in my own build suggestions, even without the hard drive.
It is simply not possible to pursue the 2500k and have room for a decent balanced build everywhere else at this budget. Saving the $125 to pursue an AM3+ platform PC will make the difference not only in that the build will actually fit the budget but if the OP considers rebate discounts then there is additional headroom that can be used to obtain better parts such as an even better GPU or a larger SSD that can store more games and programs. A CPU upgrade on the AM3+ socket to the next generation will likely not require a motherboard switch so long as a 900 series chipset board is used. As for prioritizing "GPU later" or "CPU later", you might wish to consider which one of the two is going to make more of a difference in what this person is going to do with this PC.
You forgot to mention that the Phenom II you suggested earlier will be a bottleneck for any decent SLI/Crossfire setup. I'd much rather have a modern CPU in the form of a 2500K than to save a few bucks and have an outdated Phenom II that will bottleneck even single card setups for next-gen CPUs. A Phenom II/FX will already bottleneck a single HD 7970, as evidenced by a comparison test Techpowerup did a month ago.
As far as "there is no hard drive," there is a 60GB SSD in there. That is more than enough to get Windows and apps on the computer. Adding a 500GB hard drive down the road is not an expensive proposition, and the OP's friend will be able to enjoy all the benefits of an SSD now.
For the PSU, the CX430V2 is a $25-35 unit. When OP decides that the 560Ti is no longer enough (won't be for a while, IMO), then it's really not that difficult to swap it out with a good 600-650W unit for SLI. Or, he can sell the 560Ti and get the next gen Kepler card that fits into the <200W power envelope and not swap PSUs at all. Either way, much easier than having to swap out his CPU/Mobo once he realizes that a Phenom II setup is outdated and can't handle the latest GPUs in a couple of years.