Foobar2000 is a good one, and an all around good player as well (supports ASIO, which if you know about Windows kmangler, is a good thing).

I have a similar setup to you, FLAC+cuesheets on a RAID (ReadyNAS nv), but I'm using Squeezebox as my player. (Going to build an HTPC with a touch-screen, jukebox-like interface for easier browsing).

I'm in the process of duplicating all the single-album FLACs as single-song MP3's, for my iPod and for streaming as "background music" to my TiVo and other non-FLAC-aware devices. Been using Foobar and it's been great. www.hydrogenaudio.org is a good place for info/setup help, IIRC, and for anything to do with using a PC as a music transport/ripper/etc.