PocketPC GPS software recommendations

Just got myself a Dell Axim x51v. Beautiful little device! Also got a Bluetooth GPS receiver. Using my existing copy of Streets & Trips 2006, I get Pocket Streets and can track my own location. However, there’s pretty much no “navigation” function included, though there is on the PC version of S&T2006.

Any recommendations for good PDA navigation software?

From here:

iGuidance North America ($99)
Destinator PN ($125)
Mapopolis ($89)
TomTom 5 USA ($149.99)

Anyone use any of these? Any preference?

I have used Tom Tom, and would recommend it highly.