Welcome to the site sideways, that's a nice bike, Honestly the newer models aren't a whole lot better than what you have now, just minor changes here and there. If it were me I'd hang onto it, keep up the maitinance, and add some mods here and there like suspension valving, and springs for your weight, ceramic bearings in the lowerend and trans, triple trees, billet junk, folding levers, etc. The RMs of that family from, I think 01 and up, are all great bikes, some of the stock components were kinda chinsey, but that was due to Suzuki realizing that most of those parts would be replaced w/ cool aftermarket stuff anyway. I'll go look at your other thread and see if I can help you out.
See ya round