Which SPOT to buy?

OK All,

I'm finally taking the plunge and will get a SPOT before my first
contest flight this year (this is all Paul C's fault).

But I'm curious with the 3 major SPOT options out there now, is there
a consensus which one is best? I did a quick search on past RAS posts
but didn't find anything definitive.

I have a Smartphone so the Spot Connect is an attractive option; but
it sounds like messaging costs may be a concern? I'm also relying on
_2_ battery-operated devices with this setup, which makes me a little
uncomfy.

The SPOT 2 ("GPS Messenger") looks like a well-received product but
some complain about the shorter battery-life?

The SPOT ("Personal Tracker") seems to have the best battery-life but
is the most bulky... Does it have any other drawbacks?

Thanks!

--Noel