Good value amps for the 1.7 sufficient for a large room
Recent production
Linear
Odyssey Sratos Monoblocks
Emotiva XPA 1 and 2
Add the Sanders Magtech, though it is more expensive
Class D
Wyred 4 Sound ST500 or the integrated or the monoblocks, personally, the integrated is the better value
Gilmore raptors
Used BelCanto Evo and Ref series amps rated 200 WPC@8 ohms or better
Hybrid
Rogue tube class D hybrids
NYAL/MOSCODE hybrid amps if you don't mind slight looseness in the bass
Peachtree Grand integrated tube/class D hybrid
Monarchy Audio Hybrid
Tube:
Rogue Zeus with KT120s
Oldies
Adcom 565, 5800 5802
Haffler 9500
At a higher performance level
Sunfire amp
Fosgate 4200 Bridged into stereo
Classe DR9, better yet a pair bridged into monoblocks
Threshold class A amps rated 150WPC or more into 8 ohms (should have been recapped by now)
Moscode 600
Krell KMA class A from KMA or KSA series, rated 150WPC or more into 8 ohms (should be used with a tube preamp)
Big old Tube amps
VTL Wotan, 450 and Siegfried
ARC
Melos triode amps rated 150 WPC and up
Manley DEluxe series 200 WPC and up