the 1offmotorsports kit is what I use and it works well. I prefer the 4300K verson, not the the 6000K.
Do be careful with your light sockets if swapping. The plastic socket connector on the bike is a junk part that gets very brittle with het and you will crack it up if not gentle. Theere are ceramic aftermarket replacements available (about $7 each IIRC) should you need one.
Install will take you a couple hours if you're not used to working with the lights, 45 min or so if you are.
If you have enough experience with LED flashlights you're already familiar with the lens design of the LED bike lights- same thing. The Vision X I use are 20 degree beam. 10 would give a little bit more reach at the expense of fill. Wider than 20 would generally be as a fog light equivalent (for distance only, the beam would lack the sharp upper cutoff of a true fog) or perhaps off road to see more width at slower speeds. I've built hi power custom flashlights of various types so have messed with LEDs for a long time- they're still not good substitutes for halogens or HID in many applications- their light output quality and quantity is OK only for some uses but their primary attraction for many bikes is low power consumption- which is N/A for an RT that makes more juice than some cars. The long possible bulb life doesn't hurt but the when they die it means a new one rather than a bulb replacement. Many failures will not be the LED itself but the voltage and current control circuitry they require that is built into the lamp housing. The hours of life quoted for the LED is a deliberately misleading bit of info supplied by makers because it very probably will not be what dies eventually unless the overall design is so poor that it runs at elevated temps- nothing kills an LED faster than a bit too much heat. That's why all the decent multiple LED lights are so heavy- the need adequate sized metal heat sinks to take heat away from the LED- heat reduces output as well as shortening life. If you were to use a decent light meter with the typical maglite LED setup you could easily measure light drop after the LED heats up. A common featuree of all good high end and custom lights is the better heat sinking, typically with copper or aluminum heat conductive paths.