I've got a i5 4590 in my HTPC, it's a great little chip, handles any game I've thrown at it. Obviously my 4770K @ 4.5GHz gives better performance in gaming but the i5 is just fine. I did some Corona CPU Benchmark
a while back:
HTPC:
Corona 1.3 Benchmark Finished
BTR Scene 16 passes
Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz
Real CPU Frequency [GHz]: 3.5
Render Time: 0:07:11, Rays/sec: 1,126,310
Server:
Corona 1.3 Benchmark Finished
BTR Scene 16 passes
Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
Real CPU Frequency [GHz]: 4.2
Render Time: 0:05:57, Rays/sec: 1,358,730
Gaming PC 1:
Corona 1.3 Benchmark Finished
BTR Scene 16 passes
Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
Real CPU Frequency [GHz]: 4
Render Time: 0:04:34, Rays/sec: 1,773,440
Gaming PC 2:
Corona 1.3 Benchmark Finished
BTR Scene 16 passes
Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
Real CPU Frequency [GHz]: 4.2
Render Time: 0:04:15, Rays/sec: 1,901,560