Steve,
Nowdays there are many good, reliable laptop brands out there. Sony is good but a bit high and usually has some odd limitations on music/video file transfers to placate Hollywood. My middle son has run a Sony for 5 years now and he likes it due to the music/video specialty extras.
In our office, we have used the Toshiba laptops in all price ranges for about 8 years now and they have held up well. We use the Toshiba "Satellite" models a lot. I personally carry a Satellite X205-SLi2 which is loaded to the hilt, but I use it at home, the farm, the boat and now at the office since our high speed satellite is out due to roof repairs on the office. So, the Verizon USB720 is carrying this message.
The speed of the USB720 seems to vary with the location. At the farm it is as slow as a dial up. Here in Wichita, it is fairly fast, but slower than our Satellite feed. At Grand Lake, OK, which is close to Tulsa, and Oklahoma City, it is a screamer with performance as fast or faster than the high speed satellite feed at the office. I think, due to the many high tech companies near Grand Lake, e.g., Google's headquarters is there, and all the Oil Companies in Tulsa, they must have more and higher towers.
Hewlit Packard (sp) has given me mixed performance in the past, but some of my employees use the recent models with few problems.
I think you get reliability and more bang for your buck with the Toshiba Satellite series. One I bought on sale for about $400 and it has been working fine for 3 years now.
Good luck, Whatever brand, whatever speed, I think the Verizon USB air card is a great thing to have. You can pull out the laptop in a parking lot when you're waiting for something and operate much as one could at home. In poorly serviced areas, such as farm country, though, the speed is dismally slow.
John
ps, I have both types of extension antennae and am having a tough time finding much difference in speed between using them vs. the little lift-up tab on the USB270. I have not checked the speed readout. If you are in a heavily covered, esp. with steel, area, perhaps they would increase performance, but in most cars and the boat there seems to be enough open window space to work just fine without them.