[Crap, wanted to edit the title to say "Your impressions"... sorry. Yup, this is more of a question.] Anyone has any experience w/ a Mesa Caliber 1x12 combo? I'm thinking of getting a combo... would it be a nice deal for $550 used? What other combos would you recommend? I nead pristine cleans, nice smooth, yet clear OD, and POSSIBLY an FX loop would b a good thing. Possibly a channel-switcher. This is all consideration, no specific NEED. Budget limit around $700 Spider Valve? Rivera Chubster or R combos? Koch Twintone? VHT Pitbull 45? Masters TVA 30? Zinky Blue Velvet?