If your speakers are 90+ and fairly linear, you may have the option of 300B SET as well as Push-Pull.
To my ears, SET beats out push pull every time provided your speakers are efficient enough and you are not a bass freak.
Either way, I would recommend Amps that will allow you the utmost flexibility in tube "rolling". The Cary Rocket 88 and DJH Version of the AES Superamp (Cary subsidiary) are good choices on the push-pull side as you can tinker with several different tube types.
If you want to explore SET and want to keep your present speakers, I think you may have just enough efficiency for a nice 300B Amp. Cary,Welbourne, Sun, Wright Sound Company, Wavelength and others make Amps that will be in the $2000 to $2500 range. Add some Western Electric tubes and you will be in business.