Profox vs. nVision? Pulse-oximeter software questions.

I am in the market for a pulse-oximeter and software. I tried the SPO7500 but it was DOA, so it is going back. It didn't seem very durable to me and it only has a 12-month warranty, so I decided to exchange it for something else.

One good thing about my brief SPO7500 experience (besides learning first-hand that SPO has excellent customer service, as does Turner Medical), I realized that having something even as small as that strapped to my wrist might not be the best thing for me, since I usually sleep with my arms under my head or pillow, and it would probably get in the way. I also often need to tend to my children during the night, and I would hate to forget I'm wearing an expensive wrist pulse-ox and have it get damaged (or worse, peed or vomited on) by one of them. It would be so much better, I think, for me to have to deal only with the finger sensor, which I could quickly remove.

After some research, I am leaning towards getting a handheld model, and have narrowed it down to the Nonin 8500MA or the Nonin PalmSat 2500A. Both are relatively small, have a lot of memory, use AAA batteries (alkaline or rechargeable), and have a 3-year warranty, all good features. They also have the ability to accept pediatric sensors, so it would allow me to monitor my son, who also has sleep apnea. The wrist models apparently are for adults only.

Both the Nonin 8500MA and the Nonin PalmSat 2500A are offered with either the Profox software (Nonin-specific) or the nVision software. The price difference is only $20. I have read a fews things (like Profox is more commonly used in the industry, but is a resource hog) and I have seen a few screenshots of reports from both software programs, but I'd really like to know, bells and whistles, exactly what is different about these two programs from a user standpoint, before I decide which to purchase.

Does anyone have any personal experience with these software packages? I'd really appreciate your insight.

Angela