Integrated to use as preamp for now?

OK my pre is going into the shop and will take awhile to be fixed. I am looking for a suggestion for an integrated that can be used as a preamp just for the 2 months or so then be converted for use in an office system later. I figure I need 50 watts for the system later but it also needs a decent pre with an out for use inline to my amp. SS or tube doesnt really matter. Like to keep it under $600.