Bottle head sells single ended amps. They are low power amps and require high sensitivity speakers (>95 db). Some audiophiles prefer low power amps with sensitive speakers, others prefer high power amps that can drive any speaker. The best thing to do is listen to both combinations and decide for yourself.

Personally, I'm still trying to find a good sounding affordable speaker that is louder than 95db before I buy a low powered amp. They have to look good too (sorry, no straight 8's!)