After Scott upgraded the clean channel, it is able to get WAY more clean than earlier models.
I have a 2006 that is just AWESOME, yet the clean is more AC/DC than Fender, if you get my meaning...it's got grissle, not super clean.
Then, I got a 2013 QR with the B+ option, the effects loop volume control, and the 4-button footswitch. Man, this baby has great cleans AND the effects control allows you to turn up the MV and keep the overall volume lower...gets excellent tones all around at a variety of volumes.
Overall, it depends on your needs, yet the QR has a very good clean channel and you can use the clean channel with a pedal to get quite a few tones with differing gain levels.