Cheapest GPS Navigation Package with Voice?

Recently I bought a BlackBerry 8800 with built in GPS and has been playing with different map and navigation software. Personally, I think Google Map and Blackberry Map work great and the big plus is they are free. Unfortunately, both of them don't support Voice Navigation and they are inconvenience to use when I'm driving alone. Pressing the tiny buttons to move to the next instruction, reading the small letters and staring at the blinking blue dots while driving can be a bit challenging.

Therefore I spent some time looking for the cheapest GPS voice nagivation package. So far, I think Veripath provides the cheapest with only 4.99 per month for 10 trips. If anyone think there is a cheaper or free solution, please do share with me.

However, the announcement by Garmin today for the Garmin Mobile XT package that can turn a phone into GPS navigation with voice for a one time price of just $99 may seem to be quite affordable.