I'm looking for a new (warranty is important) combo amp. I can get very very good deals on any amps that Guitar Center has in stock (no special ordering, must be in stock). I was pretty set on a Roland DB-500 but there aren't any nearby Guitar Centers that have them in stock. So, I'm looking at the Ampeg B-100R and the SWR Workingman's 15. The Roland was packed with features and at $400 for a factory resealed one it sounded like a good deal. However since I can get really awesome deals at Guitar Center I'm thinking I can get something better for a similar price. Please suggest combo amps that retail in the range of up to $700 or just give input on the amps I listed. I really want a Roland DB-500 as it looks so good on paper but I've read as many bad reviews as I have good. I like the on-board compression and chorus and the fact that it gets LOUD. I can't try one out so I'm being really cautious about outright purchasing one, especially when I have the Guitar Center discount opportunity.