I have no personal experience of the R9, but from what I've read, it's a Rolls-Royce of air rifles. As far as scopes go, I'm leaning on 50 real hard myself, and I couldn't shoot the way I want to without one. One thing to watch out for, whatever scope you get, be sure it's rated for use on spring guns. The double recoil pulse of a springer will wreck a regular scope in pretty short order. If you're set on the R9, I know there's a combo available, called the Goldfinger. Comes with 4-12x40 Bushnell (?) scope, I think you can find them for around $400. By all accounts, it's a heck of a deal, and a pretty sweet combo. Other options in scopes really depend on how much money you want to spend. The Leapers brand scopes are decent and popular, and top out at around $200. If you're made of money, there's always the Swarovski line. I think they start at around $1000, and go up from there. Anyway, hope this helped, and welcome aboard.
Dave
PS Yes, the lunatics do run this asylum, and Gene even said we could ;-).