Michael, Have them install the metal valves, mount the TST sensor, and then have them spin balance the tires. They will need to add what was described by the Discount Tire guy that did mine last week, a "surprising" amount of weights. They did it on the inside so nothing shows. Also take a look at the lug nuts. If they are a nut that has a chrome cover on them consider replacing them with solid lug nuts. Anecdotal stories about the chrome cover working itself off and then the lug nut itself is a non standard size and you may not be able to get it off when needed.
My total last week at Discount Tire was $30 for the stems and balance. 24 lug nuts for $60. The guys at DT just rock in my book. Only place I use for tires and tire service. Asked them if they would do a rotation at some point and it was a smile and bring it on in. Great customer service.
2015 GMC Sierra 2500HD Duramax