Few people recommending the Willsenton R8, I think its a good amp but not for Klipsch speakers. The Cornwall’s are too efficient for the R8 IMO. You’ll have very little volume range and the remote is too sensitive and is basically useless for the hi efficiency speaker group, just moves too fast to be useful.
Friend drives his Cornwalls with an el-kit 300b amp thast really stunning. For the money its fantastic and well within your burdget including a building service as they come as kits.
another recommended the Decware amps if you can get one they are also great amps.
Finale audio /triode labs used would be fantastic and end game amps. similarly the frankenstine 300b amp.