You might want to consider the Cree LR6-DR1000. These have greater brightness than the standard LR6 and are useful with high ceilings like yours. Quite costly, however.

I would call Cree and ask their suggestions. I did for my own kitchen project and received a lot of useful advice, including not only the specific fixture but also the best dimmer, etc. Good luck!

The lr6 should work fine. Lutron has a more comprehensive list of dimmers known to work with the Cree lights.

The LR-6 is a pretty good light soon to be replaced by Cree (shhush) It only dimms down to 25 percent. It is a good light though.

Thanks so much. I am reassured that I'm on the right track and I'll call call Cree today.

Also, you may have to play with dimmers with the LR Cree lights. Very finicky. You may get some blinking and or humming.

Cree's recommendation to me for dimmers with the 10 LR6's I will have on one switch (and the 3 on a 2nd switch and 2 on a 3rd switch) are the Lutron Skylark SF-10P (single pole) and Lutron Skylark SF-103P (3-way). Not as cosmetically sleek as some of Lutron's other dimmers, but I just want 'em to work w/o issues.

Those should work fine

The list of lutron dimmers and modules that are compatible with LR6 & CR6 can be viewed at:
http://www.lutron.com/ResourceLibrary/LEDReportCard/LED_LR6%20Report%20Card.pdf
http://www.lutron.com/ResourceLibrary/LEDReportCard/CR6%20Report%20Card_RevB.pdf

We have had some issues with RA maestros with LR-6's as well as Radio RA. They work better with the CR-6. In fact all dimmers work better with the CR-6 other than the electronic ones.

Thanks so much everyone. I really appreciate the help!

It was recommended to me that I use 'Nora Lighting' for our vaulted ceilings (about 15-18 ft) instead of Cree. They are 4" cans and guaranteed to last 7 years. I absolutely REFUSE to use 6" cans! I haven't checked the cost as compared to Cree. Hopefully they will be competitively priced.