Comms, I think any of the new Garmins would be a good buy, I try not to get into GPS recommendation arguments because it is like recommending knives to me. Everybody has their favorites and you can't convince anything different. If you have a bass pro shop near by, they will have the Montana, 30 and the CSX you can compare. If you want a nuvi and rugged GPS combo the Montana is the only one that will do this and has a very bright display. I use it with voice navigation when traveling. But it is very big and heavy, I am a touchscreen kind of user which steered me away from the 30, and I didn't care for the antenna that sticks out on the CSX, but the helicoil antenna does increase its accuracy and reception quite a bit.

I agree you can't go wrong with the CSX if that is what your after, I didn't want 2 GPSes, one for navigating and one for driving and I needed a big screen and with the updates on the unit has made it a very well GPS for me, but it is a pain lugging that big thing around, but it makes up for it with the feature. I wish there was a comparison on the antenna design on the Montana vs CSX. Anyway go with what is best for your needs, you can't go wrong with Garmin.