If the D200, then the R1 should be enough (without the SB800) because the built-in would act as commander and the SG-3IR included with the R1 kit would block the visible light from the built-in so that only the IR portion of the built-in would do the "commanding".
If you're using the D2X, I would assume that you could use the SB800 to command the R1, but as I understand it, the SU800 has some extra functionality specific to close range photography that the SB800 does not. I don't know much about this, specifically, because I don't own an SU800, but perhaps someone else here does.
I don't know that I'd say it has extra functionality as much as it has a more friendly user interface. With a few button taps I can modify the ratio of light between groups A and B, something I'd have to dig in the menus for on the D200 or SB-800.
The SU-800 is just a CLS commander and the SB-R200 are just CLS slaves, the SB-800 can be both. As long as you've got one commander the R1 kit will work, but I'm happy I spent the extra for the R1C1 even with a D200 and SB-800 commander.
Jeff Bower I wish my D200 body was a significant portion of my NAS-related expenses... Moderator Pages
I doubt you will miss this feature so I point it out only for completeness. The SU-800 has a unique Close-up mode that you can't duplicate easily with any other Commander. The Close-up mode greatly simplifies controlling the power ratios for Groups A and B.
For further research I suggest Speedlight R1C1, R1, SU-800, SB-R200 Instruction Manual. The SU-800 is also quite light and would allow you to use your SB-800 more easily off-camera when using the SB-R200s. So it's a question of R1 versus R1C1 knowning that the SU-800 in the R1C1 is usually cheaper than getting one later.