I always found the Sansa Clip+ to be the best bang for the buck, provided you are generally careful with your devices. It is very small, plays FLAC, supports additional micro-SD cards (for FLAC), has a decent equalizer, and great sound output (although I guess my M50s doesn't really have a lot of resistance to drive).
The downside is that the audio port is a bit weak so if you don't take care, you can loosen it. The plus side is that I usually find them for $20 bucks refurbished on Slickdeals, and humorously the last two times I bought them, they sent me an extra one.
Otherwise, the Ipod Nano is good - but no expandable memory.