I've done searches and cant really come up with a general consensus of who has the best TPMS on the market these days? This past summer I purchased an InnoTech (for RV's) tire pressure monitoring sys...
Pressure Pro here. Easy setup. Add a toad anytime. Doesn't have a flow-thru sensor, but it turns out that if you're not checking the tire pressures several times a day, the tires don't lose air :)