Hold on, let's just have a quick look at that again shall we and see if we can cut through the

We're talking about a new unit and you're talking about an old one......
1) You complain that the Zumo isn't fully waterproof so it's a no-brainer, yet you have to stick your HTC in an otterbox to make it waterproof.

This new Zumo appears to be IEC 529 IPX-7 by the way....you can't get any more waerproof than that
2) Doesn't this Zumo have SD card slot? So no difference between it and the HTC- In fact, the Zumo may even be able to handle SD's larger than the 4gb limit as on the HTC.....We've yet to see.
3) You Bemoan the software on the Zumo, yet happily admit that the software needed for the HTC is so expensive that you have to steal it
4) The HTC Touch diamond screen is considerably smaller that that on the Zumo, which is specifically designed for use with gloves, unlike the HTC.
I've used an HTC and I doubt that it is possible to use it as easily as the Zumo...if you can , you are surely a superhero with dextrous powers far beyond those od us mere mortals

5) How much is you're paying for the HTC?? £35 a month maybe? on an 18 month contract?? Adds up, doesn't it
6) You scoff that you have to link the Zumo up yet you also say that you link your HTC up with a Camos-BHS-300...make your mind up, is it ok to have to use another bit of kit or not??
7) No stereo bluetooth?? Read the spec again. (A2DP)
8) Outdated interface??? again, what's the point of comparing a newish phone with an old GPS?? this is the 660 people are talking about, brand new interface
To be honest with you I can't be bothered to loook up all the other things I was going to shoot you down with as I read your post, but you're right......and that old 286XS is rubbish compared to that brand new Mac