Tire pressure monitoring systems

I never thought much about TPMS, especially given the cost. Recently one of my tires started losing pressure. After having it checked out, the cuplrit was the valve extensions. Was told that eventually they always leak. I digress, but the point is that had I not cheked my pressure immediately before a trip I would have never known. That is something I always do, but I have no protection for something like this that happens during a trip and while driving. I now have a new perspective on TPMS and plan on getting a set. Damage to a coach from a tire, especially an entry level like mine can be catasrophic if not fatal. Granted they won't alert to an immediate blowout, but they may very well alert you to a potential blowout. I am starting to think that a slow leak undetected usually leads to a blowout that appeared to be immediate. Worth a few hundred and it adds a new gadget. :)

Now the trick is getting a good reliable set without spending a ton o money. Anyone reccomend a decent set that won't break the bank? Wireless of course, and one easy to install?