I use a Sigma EM-140 ring light - roughly similar to an R1 kit in its basic form - for most work with models (as in small representations of large things, not glamour or fashion models). Usually this is far better than a single flash unit, although for complex situations I've found that multiple flashes are better. The R1 kit would be much simpler in those cases since the SU-800 is easier to program for CLS than the silly Sigma LCD thingie.
I pretty much always use it for chasing butterflies. My long macro (200/f4) has no VR, and even in full daylight shutter speeds can be daunting if stopped down to f/16 or f/22 for DOF reasons.
I don't own an R1, but one of my friends has one, and I've used his SB-R200s for some real estate shots. I lit the living spaces with regular SB-600 remotes and umbrellas, but it turned out to be useful to hide the R200's in some of the lamps. That provided both light as well as eliminating the oddball color balance problems since they were set up with uncompensated compact fluorescent bulbs.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
With the commander SU800 interfaces with the SB900, the SBR200's make great high light and fill flases as they all have their own stands. I always use Ultra 123 3Volt cells, rechargables in that size are next to useless.