4.2 GHz i5 3570K good enough for WoW?

I play World of Warcraft and I know it's a fairly CPU bound game, so I figured overclocking will help me a little with some added FPS, but is it worth the extra heat/hassle & frustration? I play on Ultra and I can't imagine pushing the system the extra 400 MHz I could probably get out of this chip is worth it for a few FPS at best?

 

Specs:

Intel i5 3570K @ 4.2 GHz 1.185v (Idle: 40c Load: 70c (P95 Blend)

Gigabyte Z77X-D3H Motherboard

ASUS Xonar Essence STX

Diamond Radeon 7970 (Stock Clock)

Corsair H80i

Corsair Vengeance 16GB 4x4 1866 DDR3 @ 1866 9-10-9-9-27

1x 128GB OCZ Vertex 4, 2x 300 GB WD Velociraptor RAID0, 1x WD Green 1TB HD

NZXT Hale 82 850 Watt PSU

i ran wow on a athlon x2 and a gtx 650 at high presets so i think you shouldnt even bother with it.

If all you're going to do is play WoW...which pretty much runs on a Pentium potato, don't even bother.  Now if you're playing Far Cry 3 or something like that go ahead!

It should play wow minecraft on the other hand idk......... :p <<<<<<<(sarcasm)

I see no reason not to keep it at 4.2, especially if it is stable.