Reminding myself that if I follow directions, I can't do anything that can't be fixed. OK, venturing into new and to me slightly intimidating phone mod territory to change ROMs. Settled on CM7 Reloaded, with reminder to self that this decision can be altered later, nothing irrevocable here. I already have CWM installed from when I rooted. Most recent Titanium backup has been copied into my laptop's Google Drive folder (still haven't gotten automatic syncing to GD working yet). Next step: Nandroid backup.