You can look at Parker Signature 98 Speakers not very well known in Audiophile circles,But were made for SET Amplification in mind and is well under your budget. I have the model one lower then this playing my SET Amp in Triode mode of 1.8 watts. I have a 12x 28 foot living room and they fill up the space okay with sound.
Just type in Parker Audio and u will find his web site.
Just type in Parker Audio and u will find his web site.