Verizon offers 2 good products that we use.
This is a great all in one Plus you can use it with your laptop if you like.
Samsung I700
Whats really nice is it gives you a camera, phone, and hahahahahahas CE device all in one. (LOTS less to lug around) Reviews have been great and we really have not heard to many bad things about it.
Or if you want a card to put into you laptop use the Sierra Aircard 555
We average 60-80k even when driving and have found very few places in the us that it will not work in. In DC and San Fran they have the new systems in place that will give you cable modem speeds of 300k or better, with that system being moved out to the rest of the country now. Plus, with the i700 you can also pick up a wifi SD card to still use it at starbucks or other access points.
Unlimited access is 80 bucks a month. We have used the Aircard 555 for over a year and loved it. (Actually going to be selling it on Ebay soon since we bought the i700 going price used seems to be about 130 bucks)
For some interesting information on the i700 you can read here
i700 users forum
BTW, we used this at the internex the last few years in Vegas and the connection speed was WAY better than the access we saw our frinds getting over at the Hotel.
Hope this helps!