Best preamp/ Amp combo or intgrated amp??

I'm moving and need a new amp/ pre amp or intgrated amp. I don't have fine tuned ears, and will primarly be listening to classic country, classic rock or blues on this system. I have about $500 to spend on the amp and was wondering what kind amp would be best to power the old infinity electro static speakers I have (I have no idea of the model or make). Unless you think that these are junk then I also have about another $500 to spend on speakers. Also how do you know whch amps and pre amps go good together? What do you reccomend?