Hello I have an 04 Summit Rev X 800 and love it and to me and others they are still difficult to some to learn how the chassis works and finding the sweet spots been having my share of trouble but think I have it set up a ton better for this season. I have never riden an R/T 1000 but for guys our weight bracket which you mentioned is the same I weigh , 155 normally clothed and I figure about 165 or so with my gear and backpack on, I would Never buy a Wide, Heavy, Tank, 1000 about 90% of any threads I have read than are asking the same you are, the word of advice was 800 only just do checkin on the updates for that year on the engine and crank if that has been done or you end up doing it the chassis in 06 and 07 are the best Handling Rev made.. Just my 02 but you will have the 1000 R/T it is a complete different animal compared to the 800 or smaller engine revs, Chassis is actually different just to get the big 1000 in it and are wider on the body, strange sled, they look cool and have alot of power but to me are only a straight line power hill climber not a good boondocking sled.
No offence to anyone but most who like the R/T are just awesome or very experieced rider on that chassis or are the types who can just about ride anything impressively, and are guys who are bigger or heavier dudes who have muscle and weight to thro it around.
Good Luck, Wildcard