Tube on Top.

I decided to go completly active.
Took a prety insane and expensive aproach but this DIY project is interesting.
Where I'm at now, I would like to experiment with different amplifiers in different bands, sort of use each technology for what it's best at. Like a switching amp on the bottom, for efficiency and speed. A class A ss for those silky smooth vocals and a tube on top to sweeten the cake.
The speaker I'm using for this project is an INFINITY IRS Omega. The EMMIT tweater takes up from 3k or so goes to 40k, pretty flat avg 4ohm.
I think I need about 25 50 wats max, but I guess the more the better.

So I'm interested to hear what your openion is about getting the best top tube sound for around $2k / channel Mono block prefered.

And remember, the load is easy a single tweater. Just want the best possible sound and as much as it can be had with tubes, a natural tone.