@stumpyjon… all good points. The OP wanted a "money no option" idea, with a limited spend the Vista is still a seriously capable piece of kit which has stood the test of time, as are all the eTrex's with the possible exception of the camo(ugly) and the summit(pointless), both now obselete. I'm also on the fence slightly over the oregon bar mounts which seem to have some way to go.
The lanyard security is a good idea, learnt that when I dropped a GPS into a long muddy trail and had to fish for it manually. The other good one is to tighten the mount enough to stop the gps drooping but loose enough to rotate in a crash, bit like brakes.
@tootallPaul… I wouldn't bank on 10 days. From our experiences the returns are processed in batches and you sometimes get lucky but sometimes it takes a month. That could be old news now though as Garmin UK are growing all the time.