Deanna:
What are you looking for in a car?
Storage? Suburban or minivan. You already know the problems with the Yukon and Expedition....there is an Extended Class Expedition. Have you looked at the extended class Escalade? REALLY nice...The Suburban is 8" longer than your Yukon, MAYBE 12". If you can handle the Yukon. You can handle the Suburban. You won't get the automatic doors with the Suburban. but you will get the room and storage you are looking for.
I LOVE the Suburban!! Hate the gas tank at fill up! However - the room is AMAZING!! I've only rented one - never owned. My brother owns one. It handles like a champ!! We got 25 MPG driving 80MPH at running the A/C on it. Around town the mileage sucks - on the road? ROCKS!!
We have a Honda Odyssey. It's a love - don't like relationship. I don't like the look of the newer (2011 to current year) models and couldn't see spending $45K on a brand new car that would drop in value the minute I drove it off the lot...
Love the dependability of my Odyssey. DO NOT like the cup holders. I know it sounds sooo trivial...but cups do NOT fit well in the holders in the drivers compartment - soooo I am forced to hold my cup or not drink while I'm driving (not alcohol beverages...ANY beverages).
I owned a Grand Caravan (2001) prior to my Honda - loved, loved, loved my Grand Caravan....hated the maintenance issues.
I've rented a Toyota Sienna. Not bad. It was nice...but didn't handle as well as the Odyssey. My Odyssey does NOT have the GPS system or back up camera - it's a 2006. However, I am considering a newer year - more like a 2010 - which has the GPS and back up camera on it.
Get in each one. If you have car seats...bring 'em with you...strollers? bring 'em with you...you need to know your stuff fits....if you like a coffee while you are driving...bring it with you...put it in there...drive it around...sit in the back...sit in the middle...when I bought my Odyssey- I brought my girlfriend's daughter and her friend with me first...had them get in and out...try to talk to me while we were driving...etc.
We ruled the Routan out for us just by them getting in the back seat and their heads hitting the ceiling...they weren't tall. I didn't like the "hollow" sound of the van when doors closed. It's a nice looking van though. Had a lot of "extras" that was nice too.
Good luck!!