If possible buy used or look for demos. I’d personally look at a Parasound Halo A21 if you’re watching the budget over vintage amps. 1. The A21 is a newer amp that sonically will blow those old amps away and 2. No worries of old caps and etc. I don’t know your speakers but I bet the A21 will work just fine but maybe those more knowledgeable on the specs will chime in.
Also many manufacturers will entertain a phone call or an email on your system if their components will be a nice match or not... at least in my experience.