A urinal install requires 3 things.
1) the Urinal itself
2) the flush valve
3) a carrier
The trap is integrated into the design of the urinal, and the flush valve acts as the water supply/stop.
No one has really talked about the carrier, but you should really use one. Every urinal you have stood in front of was mounted with a carrier.
If it was me, I would go with the following 3 pieces.
1) Kohler 4904-ET-0 ("0" is the color code for white)
http://www.us.kohler.com/onlinecatalog/pdf/1116031_4.pdf
2) Sloan Regal 186-1.0 XL (1.0 is for the lowest water consumption). The Regal is the cheaper version; the Royal (which was mentioned earlier) has a longer handle and slightly different diaphragm - but it is not worth paying almost 2x as much for.
http://www.sloanvalve.com/Specifications/Regal186XL.pdf
*Note- the urinal and flush valve I listed are both 3/4" top spud. Urinals have an option for 1-1/4"...make sure that you pick matching pieces.
3) Mifab MC-30 Series plate carrier. Any model from the 30 series can be used for a urinal.
http://mifab.thomasnet-navigator.co...hanger-plate-carrier-with-two-uprights-mc-31-
If you want to get fancy, there are a few options for electronic flush valves.
First, there is the hardwired option:
Sloan ES-S (for 3/4" top spuds) but it is insanely expensive, and overly complicated to install.
http://www.sloanvalve.com/Installation_Guides/0816156.pdf
Second, there is a battery option:
Sloan 8186-1 G2 (for 3/4" top spuds)
This is the one that kind of looks like a black cap. The nice thing about it is the no-hard-wire makes installation easy, and it has a push button override. Still very expensive.
Finally, my favorite is called the Sloan "SMOOTH" 186-HWS-0.5 (SMOOTH is for "Side MOunted Over The Handle).
It is a side mounted retrofit that just slides over the handle. It is cheap, battery operated, and has a nice manual override. You would need to purchase this in conjunction with the Regal I specified earlier. To be clear, you would use this, as well as the manual flush valve.
http://www.sloanvalve.com/Specifications/Sloan_Optima_SMOOTH_186-HWS.pdf
Hope that helps.