I need help with an amp decision


Equipment: Tannoy xt 8 (91 dB/Watt sensitivity and 400 Watt peak power ), REl s/510, Black ice f360, and an audiobyte black dragon dac. 
Room size:17x21x10h
Music preference, everything but rap and pop, 
question: Can I get some suggestions regarding a solid-state amp choice for this system, please.
I can not use mono amps because of the sub and I really do not want to go the route of a tube amp. 
Two amps I have been thinking about are the benchmark AHb2 or a first watt ?, I will be trying to shop the used market. Any suggestions, would help. thank you

128x128gunmetalzin
I wouldn’t be happy with just 25 Watts @ 91 dB/Watt in OP’s relatively large room, but I do like to play loud. I’ve had 93dB Tannoys and upgraded from 25 - 35 Watts to 70 and then 100, and it was notable each time. This will depend on listening habits, but it’s something for OP to keep in mind. Yeah, I know 1 Watt can be "hella loud". It can also be completely inadequate at other times.

I've seen Tannoy lovers with Pass labs amps so it must be a good match, but usually they're using the higher powered models. Again, depending on budget, I think a Parasound Halo A21 or A21+ could be a good way to go here.
With the FW offerings, it’s probably not a good choice if you like to take a dive in the mosh pit.  I don’t listen very loud usually,but when I do,the J2,and my F5 give me all I need. But there are folks that would say my version of loud,is their version of elevator music.  
I’d go with just about any McCormack, and send it to Steve for his tweaks. You’ll come in under budget and keep it forever. Have fun!
Good God man you can get a DNA125 and have Steve breathe on it. What are you waiting for??!😍