ive got an etrex H, it does the job no probs
more confidence wandering off track as you can always find your way back
works fine under trees here as long as youve got a good initial lock
i use it in conjunction with memory map on the PC and OS maps
i got a cable for 13 quid off ebay which is straight USB no adapter needed, the adapters can be quite dodgy
also can make your own cable for free, plenty of guides out there if you can solder