The E351 gets our vote for reliability, price point and footprint. It's sister model the 2000 is larger, and does print a fraction of a second faster (250mm/sec v 160mm/sec), but in our side by side tests, it is not humanly perceptible.
The E351 is smaller and cheaper. Why pay more for something that takes up more space and is not noticeably faster? We wouldn't either.
Thermal, USB with Auto-Cutter
Power and USB Interface Cable Included