Well, if you don't want to buy an Escalade, you could always steal one.
http://www.autoremarketing.com/content/trends/escalade-tops-list-highest-theft-rate
No way, I'm not going to buy a new car only to have it stolen!
Back to reality, I'd recommend your choices that you check out an GX460 from Lexus. It's competitively priced compared to your choices, and it's much more spacious than an X5 or Q7. It also feels much bigger.It's also a Lexus, so unlike the Range Rover doesn't have a 47% chance of blowing up and killing it's occupants every time you turn the key. Seriously though, it will run forever if Lexus hasn't declined in quality -my dad had a '95 LS400 that had 550,000KM's and never had anything replaced (until it was totalled). To be honest though, it's not very sporty or visually striking (I think it's good looking, but my friends disagree). The interior is easily the nicest of the bunch though.
I'm seriously considering the X5M, looks like a pretty slick car with power to match, considering the sheer weight of the car. But that would make it a tough choice between this and the RR Supercharged.
Although I doubt CR took into account the fact that you can get a ridiculous amount of money off of the list price. You could walk in there with three shirt buttons and a rubber band and they'd contemplate the offer. And that's no diss on the Escalade, there just aren't that many people in the market for one right now.
Out of your choices, I'd have to go with the RR. I've always been a fan and the interior is first-rate. The only drawback, and it is a drawback, is the reliability. If you can live with that, and some can, I think it's your best choice by far. If you want something luxurious that can also haul around a lot of stuff, I'd take a look at the Lexus LX. This thing is a beast. My mom had a Land Cruiser (which the LX is based on) a while ago and it was a great car even though the brakes would constantly have to be replaced because of the mass they were trying to slow.
So, RR or the LX in my book.
The RR is a great car and yes, reliability is still an issue with RRs till now, I had my brake calipers replaced 4 times for my current RR Sport, which as only been driven for 4 years. But no doubt that the interior is a massive lounge...
So.. I'm left between two choices! The X5M or the Range Rover Supercharged.. Tricky choice.