What Dustylongshot said. The GPS Map 64 (base model) is a good choice. You can add a microSD card for additional memory and then go to GPS file depot to download all of the free topo maps that you need. The unit uses AA batteries so you don't have to worry about recharging batteries while in the field. It has push button commands which aren't affected by rain, snow, gloves, and such. The external antenna adds some bulk to the unit but it also adds to the receiver sensitivity so that you will get great reception in steep canyons or heavy cover. The base model is about $100 cheaper than the model with the preloaded topo but the topo you get with that upgrade is 1:100K which is of limited value for actual field use (1:24K has much higher resolution). I picked up mine off of Amazon for about $215 so you aren't going to break the bank with the purchase.
Last edited by BC3; 08/24/16.
