I normally use MMF - love how easy it is to work with. Don't really like the consistency and chewiness. Love the look of the RI or Toba's but its soooo sweet. Haven't tried the RBC. But I have heard about the greasiness.
What are everyones thoughts and comments? I have about 4 dz cookies waiting to be "dressed" in something. thanks all
I use Antonia74 RI and add less sugar than it calls in the cookie recipe.
I don't think you'd like using the rolled buttercream for your project... I find it tricky to work with and you might find yourself pulling your hair out before it is over. I did see an article where a decorator combined the rbc and fondant; however, and that intrigued me. 
My personal recommendation would be looking up Michele Foster's Delicious Fondant on this site. It is AWESOME!!! Lovely to work with.
edited for spelling error. 
Mixing mmf and rbc?? That sounds very interesting!! If you use rbc, you will need a freezer, it makes transfering the cut-out of icing to the hot cookie sooooooooooo much easier. You will have to blot with a viva papertowel after they cool to remove the grease. I personally don't like it on my cookies but my kids, dh, and customers say they love it.
edited to say:
I haven't ever put any lemon or orange oil in my rbc?.?.
You may want to try adding a little salt to cut the sweetness of the glaze.
You can flavor RBC with any flavoring...doesn't have to be the oils listed in the recipe. My favorite flavor is my butter-vanilla emulsion.
As far as the greasiness of RBC...using cornstarch and putting the cutouts in the freezer will help a lot! The cornstarch will help to absorb some of the grease, and putting the cutout in the freezer to set up a bit just makes it easier to work with.
I have never tried it without letting it sit. So, I can't answer that honestly. But, MMF is supposed to sit, too and I have used it right after making.
Maybe Michelle's isn't best for this one, but you should try it in the future. I suck at piping and if I am going to decorate cookies, it better be something like fondant or RBC. Piping only for details! 
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