Yeah I agree with bootman, I wouldn't get too hung up on the power rating spec, especially considering that there are quite a few tricks that manufacturers can use to make it appear you will get more power from an amp than you would in reality.
However keep in mind that those sensitivity ratings are for when you are one meter from the speaker, so SPL drops off rapidly the further away you get from the speaker.
In any event, I have heard our 5Ts with the Peachtree Nova and I thought it indeed sounded pretty nice. To my ear they sounded great, and I thought that they could push the 5Ts to around 90 dB with no problems when I was about 10 feet away, which is also quite loud in my opinion.
Using the same calculations that bootman did with 80 wpc and a 87 dB speaker at 3 meters you would run into clipping around 96 dB or so.