You're right...what's the rush? The only problem is that I use the hell out of my car

and I simply don't want that to stop for anything. If I was to trade/sell the car to get a more family car, I'd rather do it sooner while I still have trade value in the MINI...but that choice is oh so hard.
Her pro-SUV argument goes thusly: sitting up higher simply equates to better safetly b/c you can see trouble up ahead much better than being at a smaller car's height. I agree with this point; however, this is nowhere near enough justification to dump the MINI, in my mind. She's the first to point out that most traffic accidents involve a cellphone and/or an SUV. She just feels that the height alone is worth the price of admission.
I still feel the right thing to do is hold onto the car. I'm just going to have to get used to wearing the "Bad Guy" pants... Thanks for the insights.