If you're still watching this thread...
I used to use a Rockboxed e200 (I think that's what you meant). Recently, I've been using a Rockboxed Sansa Fuze.
I'm pretty happy with it (dirt cheap, plays FLAC, decent battery life, tiny, nice rubbery feel, the wheel is much nicer than what you're used to). The regular phone jack isn't as bad as some, and there are plans out there for a DIY line-out jack if you're looking to tinker, and want to add an external amp.
Best of all, it takes a Sandisk 64 gig card, which right this minute is 77 bucks at Adorama.
I picked it up knowing it's just to hold me over till I get something hoity-toitier, but really for the crap to mid-grade IEMs I'm likely to own in the near future, I probably don't need something higher-end.
Also, if it dies, no big investment (the card can go into whatever I get next).