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!
Marantz PM15S2 LE, Oppo BDP-103, Simaudio Moon 100D DAC
VPI Traveler V2 with an Ortofon Rondo Blue and Simaudio Moon 110LP, Technics SL-1400 with an Audio Technica AT-14sa and Pro-ject Phono Box S
Dynaudio Focus 260's, Rel T-1 and a Panasonic TC-P54S1.