Re: Gonna build a rig, opinions??
One thing I'd recommend is a far better Power Supply Unit.
People often overlook the PSU and only look at the total combined wattage from all the rails. It is paramount that you have a decent PSU, otherwise you will get random restarts, BSOD, and general instability problems. In addition, it will heavily limit your upgrade potential.
The one you link to has two 12V rails, one at 20Amps and the other at 17. That's 444 Watts from the 12Volt lines and with a i5-2500k, your motherboard & memory and the GTX560, you'll be approaching that 444W on the 12 volt lines on full load. Besides, looking at reviews, raidmax seem to be a mixed bag.
Seriously, don't underestimate the importance of the power supply unit. In addition, some PSU manufacturers rate their PSU solely on the wattage of the 12V lines (the most important when the system is under load). This rating solely on the 12V lines, where others combine all the wattage on all the lines, means the definition of PSU wattage is not the same accross all manufacturers. Yours is rated as a 530W, and provides 444W of that via the 12V lines - and I can't see whether that is peak or continuous output. Mine's in comparison is rated as 650W but provides 650W of that on the 12V lines (54A) - countinous. Taking into account my 3.3V and 5V lines, Antec could have labeled it as a 826W power supply, but they're slightly more realistic to what the user needs so only take the 12V lines into account.
I strongly suggest you get a beefier PSU, and don't skimp on it. In my opinion, it's just as important as the quality of your motherboard. Your getting an Intel Motherboard, which will be rock solid for stability. Don't couple it with a low range PSU. It's dangerous to the health of the rig. Especially as you'll be bringing it's 12V lines to their limit under load.
Get an Antec/Seasonic/Corsair or something. Research it, and look at the reviews - preferably a group test with them all being put under load. Bittech/Custom PC will have that sort of thing on their website. Budget at least ~£60 (or whatever your local currency dictates) for a half decent PSU. You don't need to go nuts on a 1000W PSU - that's just silly, but get a decent brand and one that can pump out a decent ammount on the 12V lines - and ensure it's rating is continous and not just peak - it's a nasty way manufacturers get you to buy a sub-par product.
Don't get that PSU.
Anyway, that's my 2p. I might sound a bit too firm on this issue, but PSU's are widely under-appreciated and it may all end in tears....
Delta: "What's wrong Chris?? Chris: "I miss my old Cyrix"