Interested in buying either TOM Tom Classic 5 or 6 inch satnav. But just had flash deal come through for GO Discover 5" Special Edition. This says it comes with dashboard mounts, but can it still fit on windscreen? I believe the latter is a much better model, but what advice would you give me. I did have a Tom Tom Start 25 but that has bow packed up. I need to replace it but can't afford too much Classic 5inch in £119, Classic 6in is £139 and Go Discover special is £137.50. Any help/advice would be appreciated