Most compressor switches have a 30-40 psi differential between cut in - cut out. So your Viair 450, if it had a Viair pressure switch or pressure relay cut in at 110 and out at 145. So you end up dumping air to get the compressor back on.
Viair carries a 165/200 switch or relay that would go with the 480 series.
If you think the 200 might be too much there is a least one company that makes a 135/175 relay.
Keep in mind though, most tanks are rated for 150, so you need to make sure you match the tank to the compressor output.
My plan includes two relays. Like mentioned above, 99% of the time I will be using the air for the trucks air ride supply and maybe the hitch. And soon to add air horns. 150 PSI horns are less expensive then the higher pressure horns.
For the few times I need to air the trailer tires, a toggle switch for the 200 psi relay would be a simple addition.
A sample of Viair switches.
P/N 90110 - 85 / 105 PSI
P/N 90111 - 110 / 150 PSI
P/N 90113 - 90 / 120 PSI
P/N 90118 - 165 / 200 PSI
I would use a relay switch opposed to a standard 30 amp switch. The potential run time airing up trailer tires may overload the standard switch.
http://www.viaircorp.com/OnRoad/electrical.html