Miss my S2R 800. But its suspension was Primitive Pete, and (esp in front) too soft for even my 145 lb ass.
Read a bunch of threads about installing Suzuki GSX-R forks, cartridges, Ohlins, and so on..."almost" updated its suspenders, but ran across a blown-up S2R 1000 and bought it. Better suspenders, and (once I put the motor right) a good bit more power too. (Downside is the DS valve guide issues, but that is a known quantity, and it's not a death sentence.)
If you get a chance, ride an S2R 1000, then figure out which path you want to take. Selling the 800 and buying a 1000 in equivalent condition would (IMHO) put you money ahead.
If so, you can still pump money into the S2R1000's engine and suspension, but you will be starting out way ahead in both respects.
May even lead you, at some point, to look at an S4R or S4RS (which is where I ended up). Whole different animal, with a whole different personality and (in some cases) a whole different set of issues.
Welcome to the wonderful world of Monsters, and enjoy.
Edited to add:
One more difference: the 800 has a slipper clutch that was ahead of its time. But the 1000 has a dry clutch which is an integral part of the Ducati Orchestra.