I have used return policies before, the shops I use charge for non faulty returns postage, one shop I sent two items back (with free returns policy) because they did not have enough power, they are probably fed up with me
What I want is a combination of the GB and Ampeg, it would seem that the GB has the best tube tone and most bass, I think I would trust the GB more as I have not read of any issues with cutting out, (I am still not sure whether any cutting out issues are not caused by running the amps too hard in many cases), if I was to order both to try I would have to first pay for both, I am not in a position to pay for two amps no matter how temporary it may be !
That sexy little blue window on the GB is tempting
Either way, any one of these amps would be fine for me