Which is better HTC touch Cruise, Diamond, TYTYN II? for general and sat nav use?

Hey all
Just coming to upgrade my monthly contract and if I stay with O2 I’m thinking one of the above. Cant really seem to find much to separate them. yes, a qwerty upright is fantastic but as it means more bulk I can be convinced either way (plus I’m a guy and not sure the buttons may be a small weeny for me to use. Main use will be as normal buzz. web surfing and as a sat nav in the car.

In terms of sheer superiority must I go orbit 2 (HTC Touch Cruise)or stellar (TYTYN II) or wait until (next month) with a bit of luck to get what I presume will be branded the Ignito 2 (HTC Diamond touch) with the upright.
I like the TYTYN but just want to get a excellent handset
Obviously the larger screen the better but not at the pcost of performance (I have moderately young eyes so wont be squinting too uch even if on the dash.

Main criteria are:
Not a flip buzz
Reasonable battery life
Able to use sat/nav GPS including memory map (basically I want to be able to use this as sat nav on road to find my way nearly but also to use it offroad when greenlaning with memory map and GPS
Able to use long and lat coordinates as well as postcodes
Have a camera but doesn’t need to be all singing all dancing huge megapixel
Decent for internet treatment with quick enough firmware to make it livable with
A contract that includes data for a decent monthly price (not, for instance 02 who seem to charge a fortune)
Touch screen only if it is very usable and insightful
Not fussed about incredible music abilities – basic MP3 is fine
Radio nice but not essential

thanks for your help