Debonair and Britannia are known runners and the airplanes do flyeven if they are somewhat old. Both FTO's are ok but the rates at the two above are pretty well at the bone so where is the saving going to be achieved? Personally I wouldn't use an FTO unless it was known to a few people here who at least have seen the aircraft and spoken to the punters. It's amazing how many extra costs suddenly appear just when you are most relaxed about achieving a good deal. What about fuel surcharges? what about the credit on fuel purchased away? what about insurance? what about minimum flight hours charged per day? what about if a day is unflyable due to weather - are minimum hours charged?
If wings and wheels doesn't go right, it might be a wing and a prayer for you!