Another kudo to Quicksilver. I’ve been using all QS gear for the past 20 years. The stuff is built to last and I have never had a burp from any piece that I own. If you check the site you will see that most of the amps are now discontinued. Mike is still making the Mid Mono. If 40 watts is sufficient I can’t see you going wrong with those!
http://quicksilveraudio.com/amplifiers/