From what I have heard in general, TP seems to be a lot better, I have never used EV1 so I can't compare them.
I have seen some very satisfied customers at EV1 but have seen a lot more at TP.
I think you would be better off at SM from what I have heard also...the support doesn't seem to be any different, the same techs handle both DCs.

If you find a good reseller you will be good.

John