If your seemingly quite happy with the sound of your AxeII rig, running Fw9, and seemingly don't want any of the new amps/features of the newer firmwares, what is the point of upgrading ??
Its going to cost you probably $500 or so on the buy vs sale, and really the main reason I think people want the XL+ is that it has a longer foreseeable future of firmware updates. The II's last update could be who knows when, its been at "end of life" quite a few times already and Cliff always finds a way to still update it... BUT, your happy with FW9, so even if there is Q5 or whatever, and even if the XL can run it, but the II can't, you seeming will still be on FW9, so doesn't seem like it would benefit you