I have two garmin GPS units. I just received my 2nd one this week. The first one I have is a garmin 60CX. I bought it back in 2006 and it has worked flawlessly. It still works today however it lacked features I need. The biggest two things that it lacks is it does not have an electronic compass and it does not have aerial capability.
In my opinion, an electronic compass is a must have in any gps. I started hunting an extremely large, thick track of public land where everything looks the same in the dark. You can walk through the timber a mile crossing many ridges, ravines, creeks etc that all run different directions. The problem I would run into with my old gps is it was so thick in areas I simply could not walk fast enough for it to lock on to my stand. I would also like to note a lot of these stands were marked when shed hunting the year before. I do not know the area well enough to go in blind without a gps. An electronic compass is a must for me since now I can stop and it will automatically point the way I need to go. It is a very nice feature.
The next thing is satelite imagery. Yes, I have it on my phone however I do not have service in these areas. my phone is locked into 1x where I can essentially send text, receive calls but there is no way I can get aerials to load. I have tried apps such as ONYX hunt maps and trimble outdoors where you can actually cache maps into the phone and you are supposed to be able to use them without service but they never worked reliably.
The reason why I wanted to have the aerial feature on a gps is when I am in the woods I can simply point right to a field edge or certain landpoint, make it a waypoint and come out right there. It is much easier than using a phone. I typically would use this when trying to get out of the woods when tracking or hauling out a deer. A lot of times you will get to following blood and not really pay attention where you are. Again this is a mammoth piece of public that I am not too familiar with.
The last part you will want is 1:24K topo maps. I have the 1:100K topo maps on my 60cx and they do not offer much detail. With that said, I would avoid units with a T on the end. You will pay more for them up front and you will end up getting the 24K topo maps anyways which will cost $60-$100 so you mines well save that up front by buying an S model.
The new gps I bought is the Garmin 62S. Normally they are $349.99 but if you watch enough they will eventually pop up for $199.99. I loaded aerials for all the places I hunt on it and they are of high quality. I also will be loading the 24K topo on it soon. I stayed away from touchscreen as there were a couple items I did not like about them. Mainly if they get wet they don't really work just like your phone. I have found my way to my stand many times in a rain storm. Also since they don't have buttons you can't wear light gloves with them. I believe the 62S or 64S model is better suited for a hunter myself.
Overall, I really like the 62S. The electronic compass is dead on, the satelite aerials are great and it mirrors my old gps. The satelite acquisition is much faster than my old unit and will lock on in my basement. It is a great unit.
In a nutshell, get one with an electronic compass, satelite imagery capability and 24K topo. You will be set.