I have only played the LE so I can't give you a comparison but the LE has the moving item near the disk (sorry forgot the name) where the standard has the static item, and the ramps glow various colours - I didn't mind the game play though prefer IM over it. You could put el wire around the ramps and make it look similar to a LE.
Price sounds about right considering if not not to bad as the last sold by AMD about 15 months ago for $6600.
I had reservations when I got my Iron Man which was sited for close to 18 months and it has done amazingly well, with no vandalism and no noticeable wear for 5000 plays - I think many a couple of transport scuffs on the front corners - black texta fixed that. Where is it located - city / state ?.
As for Game play, alot of people say Spiderman plays awesome so Tron sits a few back, I prefer my Iron Man over spider amn and enjoyed Tron though I think I was blinded by the looks, but the Spiderman will cost you more than a Iron Man and definitely more than a Tron.
If you can get there to test definitely do it or if in the Newcastle area happy to test for you to check for damage and that it plays well. I am sure some others in other areas can offer some help.
Hope that helps.