Not sure if you've put the finishing touches on Gavin's disc(s) but Brian's post references some bands whose songs should definitely be on that list. Specifically, I refer to:

'Velvet Roof' by Buffalo Tom, 'I Can Dream All Day' by the Posies, 'Sunshine State' by Superchunk, 'Gold Soundz' or 'Range Life' from Pavement, and if he anticipates getting into a fight with his wife (Maureen...am I right...have the drugs not yet entirely fried my brain and my memory is awesome??) perhaps the slowly building angry 'Not Too Amused' by Sebadoh.

Btw...if you could export and post the playlist when you're done that would be peachy.