Well, it really comes down to what you want. I know you probably aren't looking for this answer. I think you'll get several different answers because in the end, everyone has his/her own opinion on this matter. My thoughts are this: If you are going to have to sell an arm for the R, then go for a leftover 1000S. If you plan on taking someone 1+1, then get that. The 1+1 can easily be converted to mono, whereas mono->1+1 is a bit more difficult having to purchase a new subframe and all.
The R of course is superior. I'd definitely recommend it, as will many others on this board, just from pure stats and reviews. The color, in the end, should be left to you.