I'd say the more features it has the more you need to know to operate it. I bought my dad a magellin 310 a few years ago for $99.00. I think its simple to operate but he still can't use it. I used it today to mark new stand sites. Choose a model that allows for quick and easy use of landmarks(camp, road, stand etc). Thats what your buying it for. To go from here to there, and marking spots. Make sure the LMKS are not easily deleted. It must have a night light, battery meter, solid and secure battery compartment, distance read out is very helpful, routes with legA, B, C etc, for those crooked routes to difficult stands(may not need) and lastly the rest of the optional stuff you really don't need IMO, clock, speedometer, elevation, etc. A gps is very much worth the cost, you'll be glad you did it. Edit: make sure it has enough landmarks as your using it for fishing too. I think my dads has 100.

I would definitely opt for the unit with more features...at least in terms of the two you are considering here. I bought a mapping gps unit last year and I am sincerely glad I opted for one of the more sophisticated models.

If you hunt with friends or ever plan to take a trip out west, I would reccommend a glance at the Garmin Rhino series. I have the model 110, which is the GPS/2-way radio in one. You can talk to others that are on the same channel and even set your unit to send your position when you key the talk button. Then your position will be shown on the others' GPS's as well as theirs' on your GPS. I think it's the coolest thing. Aside from the two-way radio feature, the actual GPS is very intuitive and simple to use with one hand.

I have two friends that have the GPS76, and both of them couldn't be happier. The screens are a little bigger, but the functionallity is much the same without the radio function. It all boils down to what you want to do with it and how much you want to spend. Good luck!