Just wait until you drop that tablet, or get it wet!! not worth the hundreds spent on it imo. I am a follower of the iphone though and would reccomend that wherever possible - not so much to use as windy s/ware but just as a general advancement to your every day life
I went iphone a few years ago, and i seriously dont think i would be able to live without it now

If you want something that can support your software then ask the developers what they have apps for - you may find that android apps are a little more common for this kind of thing.
So really my advice is
if you want a phone that is pretty much an organiser, go iphone.
if you want a tablet, its probably not best to risk it being out on the road all day

but who knows - you may be the careful type
if you want something to run your w/c software, pick which program you want (if you havent already) and ask for the programmers' reccomentdation or mobile output device.
Hope this helps a little!
David