Completely depends on the price range you are looking for. My Husband and I were just in the same situation. We had a Jeep Liberty, which i am almost positive is smaller. I used to be totally against Vans, however we just got one! After doing a TON of research i would have to say either the new Niessan Qwest or Honda Oddessy (fully loaded of course) are your best best (if price is not an option). We just got a 2008 Chrysler Town and Country. I can fit my double stroller, both umbrellas, plus two car seats (29 mths and 14 mths) and my oldest daughter who is 6, Along with Nanee (Grandma) for the occasion trips! It's got a ton of space below the seats, side compartments, slididng doors on both sides wow. Keep in mind the bigger you go with an SUV the more gas it guzzles. Not to mention starting prices are around 10-15K higher. Don't get me wrong I was completely sold on the SUV as well and caught up in allure of the non-mini van image, never thought i'd own a van EVER. But really you can't beat the space for the price or how far they have come.
If you are still looking for SUV the larger ones that are best are the Chevy Tahoe, Surburbans, Niessan Sequioa, and Ford Expedition.