Which mp3 player?

Right, I'm in the market as I lost my Cowon J3 and my dad has offered to buy me something given I can't afford one.

I'm looking for:
1) Supports FLAC files and has silly high quality audio processor
2) Insane battery life, at least 40+ hours music playback for FLAC files
3) Relatively small size, with nice aesthetics
4) Mass storage support as I use Linux and MTP devices won't work
5) 32GB basic, ideally with micro SD slot expandability

In the past, this has always meant "buy a Cowon", but it seems that they've gone all video player and the things are much larger now.

FLAC means no Apple. The Cowon Android ones have crap battery life. The non-Android Cowon are too large. The Sansa are too small, too poor battery, lack decent aesthetics.

Any other suggestions?

WTF! Why do you want FLAC on a portable device? Unless you want to carry a 1TB hard drive around...

I'd recommend a 8GB Sansa Clip+ when they go cheap and a 32GB SDHC card. Convert your FLAC files to Ogg Vorbis for the portable media and be a happy bunny.

You can Rockbox it too but I didn't like the interface so went back to the original firmware.