Well, I own the T2 and have been nothing but happy with them! My only complaint is that I have the 50C for my center (the XL model wasn't released when I bought my T2), and that isn't the greatest center channel.
When I bought the T2, the MSRP was $2500, now the T2 has gone up to $3000
If I had it to do over again (especially considering the price increase), I would probably go with the T7 (wasn't on the market when I bought mine) and use the extra $ on a pair of SVS, HSU, Rythmik, or PSA subwoofers.
I will restate this though:
If you are looking at music only, then the T2 is a great choice and no subwoofer needed at all!
If you are looking at movies at least about 50% of the time, then you NEED a subwoofer regardless of the T2 or T7.
I run my T2 full-range and supplemented with a Rythmik F15HP

The neighbors love it!
Edit: As far as needing a better receiver, I doubt that will be the case on the GEs. At least the T2s are an easy load to drive. Over on the GE forums, you can read about Sandy driving them with a SET amp. If I remember correctly, they also have a Zobel network that helps make them an easy load to drive. If your receiver is out-dated, then you may want to replace it, but I doubt that it would be underpowered for the T2s.