> 2) gapless playback

The iRiver H320/H340 have a *slight* gap between tracks, but otherwise
meet all of your requirements.

> Which player would you buy for using rockbox?

Well, if this is #6 on your list, then cancel my recommendation of an
H320 or H340 ;o)

> Most hd-players do cost about 300 EUR and more.

Wow, your prices must be inflated there? A HD player here in the US
costs about $250 and up, and I understand that 1 EUR = about $2US, so a
HD player should be like 125 EUR ?

-- 
Ian Douglas
blogs/photos: http://www.thedouglasclan.com/
geek stuff: http://www.w98.us/