You don't have much of a choice right now in the US. There's the INRatio by Hemosense and the ProTime by ITC. I had a ProTime for 3 years and was grateful for it in order to home test. I now have the INRatio and LOVE it. I find it much easier to use than the ProTime, it's smaller than 1/2 the size of the ProTime and it runs on AA batteries. The ProTime has a rechargeable battery (and the recharger is heavy.) If you travel the INRatio is much more portable, but that doesn't mean you can't travel with the ProTime.
If you're thinking about it. Give QAS a call (their banner is at the top of each page here) and they'll do all the leg work for you with your insurance. You will need an Rx from your doctor and possibly a statement from him/her on the need for home testing.
