I managed a good listening volume with 0.5W. I know that you have posted about liking your music loud, but a TT2 with 7W single ended, will give you 14 times the power that I was using.
Please try single ended first, and see how you get on.
Apologies if you know this, but all other things being equal, 10 Watts is only double loudness of 1 watt, 100 watts double 10 watts.