Hi Christa...
As another "grocery getter" and carpool mom... here's my take...
The only advice I can give you is to beware of the radio reception on the '03 H2's! I have been round and round with my GM dealer (no HUMMER dealer in my neck of the woods!) about the poor reception, to no avail. To give HUMMER the benefit of the doubt, I DO have an appointment with a dealer next week... we'll see!
However, from my post and research here, I find that my problem is obviously a somewhat common one... and evidently the reason for changing to a "whip" style
(DRTYFN, don't go off on that one! 
-- NOTE the sarcasm icon...) antenna on the '04 models.
Otherwise, I love my H2, and would find it hard to go back to a smaller SUV... Although, my husband would love to see me drive something that is a bit more fuel efficient -- oh well!
Good luck in your research... hope to see a pic of your H2 soon!
OK... just saw "NEW H2" in this topic! Sounds like you are already on the right track!