..To dredge back up this old topic, and let everyone know what I decided on for this:
Got the GPS unit last week, a Garmin RV 760LMT. Really like it and all the information it provides. I use it driving to work and back every day just for the traffic updates/warnings it provides. Haven't had a chance to try it out in the Motorhome yet, but hopefully will soon.
After thinking it through, reading the various responses here, and looking closely at the dashboard on both the MH as well as our everyday driving vehicles we will use the GPS in (Kia minivan and Ford Fusion), I decided on
THIS weighted dashboard mount piece. Ordered it last week (could only get it online, no stores had it), its supposed to be here tomorrow.
I've been using the suction cup mount to mount it to the windshield in the Fusion so far. That works OK, but will definitely be nice to have it down on the dashboard, where it won't block the view as much and will be easier to 'hide away' to prevent theft.
Seriously considered a mount like
THIS that some had suggested on here, as some stores had it in stock and I could have obviously got it much quicker. However, this one forced me to put the GPS unit further forward (closer to windshield) than I would have preferred, due to where the bean bags are located on it. The unit I ordered is more 'horse shoe' shaped, and will allow the unit to sit further back, where I can reach it easier.
Definitely some good points made about theft, it may well be that I'm being a bit too 'paranoid' about that. I agree 100% that it really doesn't matter for the MH, but when used in other vehicles this IS more of a risk. 'Tis why I wanted (and ordered) a mount that can easily be stashed away, removing any easily visible 'evidence' of a GPS unit.
Anyway, just wanted to 'close the loop' on this thread, in the hope that maybe it'll help the next person that comes along and has the same or a similar question. :)