Budget High effeciency speakers

I have a Marantz 2226 receiver and just was given (yes given) a CJ Sonographe SG3 turntable. It has an Audioquest PT7 arm and a Sumiko Blue Point. I need some advice on budget (under $500) speakers. I will be putting these in a loft and my listening position will be about 7 feet away however the wall behing me will be about 15 feet away. the loft is open to the 1st floor.I'll be listening to mostly classic rock with some blues mixed in. I wont be listening critically, just want something that sounds good..kind of nostalgic. The marantz was my dads I rehabbed. Any advice is appreciated..thanks all.