Rick,
One of the best alarms for our C14's was omitted from your list.
http://internatrix.com/ TW1000 paging alarm. There were some very detailed write-ups on the old forum (the one that was destroyed to make peace with COG)
I believe Fred Harmon even gave it a thumbs-up in one of the Concourriers.
The only thing he didn't like was the auto rearm feature. It required you to turn the ignition on within 25seconds of disarming or the unit would automatically rearm. I figured out a work-around for that problem and posted it on the old site and the Internatrix site.
Mick