Many people like road tubeless wheels, and you should be able to easily convert most wheels with the Stan's kit. Keep in mind that the tubeless tires are generally heavier than the weight of a good road tire with an inner tube. Also, once you add sealant you increase the rolling resistance. Is the extra weight and rolling resistance noticable? Probably not. You can also improve the feel of a standard road tire by trying a latex inner tube. Strangely enough, the Stan's Alpha 340 rims get compressed when used with tubeless tires, and you can search and find people reporting problems with the spoke tension dropping a large amount when used with tubeless tires. If you choose those rims and want to run tubeless you need to let the builder know and he/she will modify the spoke tension if necessary (preferably mounting the tires you plan to use and double checking for the amount of spoke tension drop).

I'm pretty happy with the improved ride quality using wide rims. I have not personally rode on tubeless tires yet, but I definitely felt an improvement in handling with wide rims (I put a few thousand miles on Velocity A23 rims).

In terms of hubs, Shimano hubs are quiet (Ultegra and 105 hubs are practically silent but you are limited to 32 or 36 spokes with those hubs). White Industries hubs are not annoyingly loud, but they do make a sound (sounds like a rattlesnake to me). With many loud hubs you can add grease to quiet them down, but make sure to use a grease that will not make the pawls stick.