Im using a manely stingray with aural symphonic cables on my auditors. Excellent system match. However, I think that amp might fall short of your expectations for your room size. But I would certianly suggest you audition the combo if possible. The BAT tube equiptment I have listened to in the past sounded alittle dry/sterile. Not so sure it would be a good choice being the tweeter on auditors is a little lively. Maybe consider a used pair of VTL 185 monoblocks or stereo 150. Very dynamic amps. I think the 185s would give you the punch you are expecting out of an amp. The VTL 5.5 preamp is pretty nice for the money as well. A CAT preamp would be my 1st choice. Joule electra also offers a nice pre-amp (very slight drop out in the upper mids). You might be able to do the CAT and 185s within your buget. Are you including cables and interconnects within that? The aural symphonics Im very happy with. Amazed how much the open up the sound.
Another system choice to consider is solid state amps with a tube pre-amp. Might get more bang for you buck that way. Certianly give the tubes try! Is it possible to bring you speakers into a Highend audio dealer and audition equiptement there? They might offer you a good deal on some demo equiptment providing you find a combo you are happy with. Try before you buy if you can. Good luck!
Another system choice to consider is solid state amps with a tube pre-amp. Might get more bang for you buck that way. Certianly give the tubes try! Is it possible to bring you speakers into a Highend audio dealer and audition equiptement there? They might offer you a good deal on some demo equiptment providing you find a combo you are happy with. Try before you buy if you can. Good luck!