"you really want the 8g card to make 24bit/48kHz uncompressed recordings of sessions."

Except that there's really no point in using 24/48 for recording a session with the internal mics. The the noise levels of a pub and the general quality of the internal mics don't merit better than a 256k or 320k MP3, which is really pretty good and takes far less recording space.

24/48 might be useful for recording a classical concert or making a studio recording with a pair of good condenser mics and an external preamp, but it's overkill on a pub session.

Anahata