All this AA battery talk – the Satmap can use AAs as well – it comes with a cradle for 3 AA batteries.
I think the etrex types will be a big downgrade in features.
The satmap with 1:25k custom map for my immediate riding area (swinley/surrey hills/tunnel hill) is one of the best ‘toys’ I have bought for the bike.
I can follow routes that orientate to the direction I am cycling (like the 2D mode on a car satnav) and with it zoomed to 1:3k res I can ride full speed as it guides me round the route.
The screen is large enough that I can plan new routes on it (from books or on the fly).
The buttons are nice and large so I can operate them whilst riding with muddy fingers, so no touch screen to fight with as the bike bumps around under me.
It is robust and water resistant.
It is British.