A quick check of www.lrx.com shows that the DII that you're looking at seems to be consistent with other vehicles in that price range. Also, a scan of http://carpoint.msn.com/kbb/ seems to also show that the price is right.
Just pass the last 7 #'s of the VIN # on to Tincup and he can do a quick check of the vehicle's service history to see if anything is out of the ordinary. Tincup - thanks again for providing us with this valuable service!
Also, as a person who recently purchased a Land Rover inspection (on my OWN vehicle), I would highly recommend going the Rover dealer route. They have great insight into the little things and really pointed out a few things I could do to avoid problems moving forward. The one I had done on my '96 SE7 was a 50 point inspection.
Also, on RX or MDX - those vehicles are worlds apart from a Rover. Rovers are more truck-like while the other two you mentioned are much more car-like in response and feel. In fact, I think they're both based on a car chasis. It really boils down to a few things - namely - will you ever use it offroad, and which feel/experience do you prefer?
I for one prefer the feel of the Rover and found the others to be a bit too car-like. I've test driven the Mercedes, Acura, Lexus, Toyota LandCruiser, and Chevy Trailblazer (in addition to the DII).
The only other vehicle that I've test-driven that made me do a double-take was the BMW X5. And it was for an entirely different set of reasons. In addition to my '96 Disco, I've also got a '97 Defender 90. I've been taking the D90 offroad and into the mountains and it has been doing an awesome job at satisfying my 'truck' urges. But I've also yearned for a car since I gave them up in 1994 with my Jeep Cherokee purchase (the start of my SUV career).
The X5's sporty BMW handling, thoughtful german engineering, and more fuel efficient 6 cyl engine that does 15-20mpg (with many people getting 23+ highway) are extremely appealing to me. It also satisfies my desire for a car and an SUV - in one purchase.
Those are the 2 vehicles I'm currently contemplating, but the DII has an inherent advantage (IMHO) in price (lower), financing (4.9% APR), X-plan (gotta love it), and appeal. So at the end of the day, barring any irrational (I'm already trying to talk myself out of the X5!) decisions, I'll be maintaining two Rovers in the stable over the next 30-45 days. In addition, my wife is seriously eyeing the Freelander, so we're a bit odd in our Rover tastes Keep that in mind when evaluating my post!
Best of luck and let us know what you chose, either way.