i currently use a v1 sansa (8gig +2 gig microsd card) and its very good but recently space has become an issue, are there any good quality high capacity harddrive based players readily available that can either be rockboxed or have useful features equal to rockbox (gapless playback, cuesheets, replaygain, .wv, .flac, .ogg)? i dont mind a rockbox port that is quite new as long as its reasonably usable.

edit - bluetooth would be nice as well

I would start by looking here:
http://www.rockbox.org/twiki/bin/view/Main/BuyersGuide

none of those really seem like players i would like to own apart from maybe the ipod 5.5 i might just wait for microsdhc cards larger than 8gig to be released as the sansa is a nice player once rockbox is put on it.