@Beer - SWEET motherboard my bro!
I like it. I like it A LOT!
I know you don't plan on OC with it, but please do - at least a little. You will be amazed, the socket 1150 CPUs are very simple to OC (at least moderate amounts) and do not use too much juice. In fact, an OCed socket 1150 i7 will use less power than your old AMD CPU at stock settings.
The CPU you want is an i7 (so it has HT) second generation or higher. That means either Sandy Bridge, Ivy Bridge, or Haswell.
The part numbers are:
Sandy Bridge: 2600K, 2700K
Ivy Bridge: 3770K
Haswell: 4770K
Definitely try to get a Sandy Bridge or Ivy Bridge CPU used. Don't worry about spending the extra $ for a Haswell in this situation. Seriously, it won't crunch any better (maybe 1%) and it won't OC any higher. The Ivy Bridge 3770K is the sweet spot, but if you can score a great deal on a used Sandy Bridge - like a 2600K or something like that, then I'd go with it! You could potentially save a lot of money going that route, and only give up 5 to 10% of the performance of the latest and greatest - which you could easily overcome with a small OC on it.
Your RAM will be just fine, yes you will get higher benchmarks with faster RAM, but honestly there is no difference at all in my Socket 2011 rigs with 1333 or 1600 RAM, it doesn't change any crunching output - even when I'm OCed to the hilt like hitting 5GHz - the RAM is not the bottleneck, so I'd keep the RAM you have there and put the $ into the CPU.