IMO these are excellent speakers for the money that you can get them for. I had a pair of Wharfedale Diamond 9.6's, one range down from the EVO's and I would describe them as very warm, rich and full bodied. Wharfedale is not the last word in accuracy but if you like a musical speakers with the above attributes I mentioned, you will like these. I replaced them with another warm, lush sounding speaker, Vienna Acoustics. And the Wharfedales? My friend liked them so much, he bought them from me so I still enjoy them when I listen to his system.
The 6 ohm impedence will pose no problem as Wharfedale will state in the manual they can be driven by any amp rated into 8 ohms. Add real wood veneer cabs in choice of color and outstanding looks and I think the EVO 2-40's are a great bargain. If I was in the market for a new pair of near 2K list speakers, these would be very high on my list at what they can be had for.
Did you check out the Wharfedale owners thread?" I am sure you will find useful information from cuurent EVO owners.
Good luck and happy listening!
Parasound 5125, Parasound 2100, Pro-ject RM 5.1SE, Dynavector 10x5, Pro-ject Phono Box S, Pro-ject Speed Box II, Arcam FMJ CD17, Pioneer Elite VSX-52, Pioneer Elite BDP-52FD, Vienna Acoustics Bach Grands, Vienna Acoustics Theatro Grand, Wharfedale Diamond 9.2s, REL T-1 & Panasonic TC-P54S1