Hello everyone:

If I buy a new D3 to replace my N1 can I just use the current install of cables I have to connect the brain and head unit and GPS antenna?

thanks..

uhhh no brain on d3. Antenna is the same though I think

Yes, the antenna is identical. I just replaced my N1 for the D3. The reverse, speed sense and gps all plugged right in. You will have to wire your D3 harness to your car and as said above, no brain (but still same function as the N1) to wire in.

is the functionality worth the upgrade from the N1 to the D3?

i have the latest map disks for the n1?

also, how much is the old N1 worth? it is in excellent condition.

Don't know how much the N1 is worth. Mine crapped out so Best Buy exchanged it for me. If you want better navigation then don't bother with the D3. I had the N1 with the N3 map disks. The mapping on the D3 is minimally better. Now if you're talking about interfaces (sat radio, I-Pod) then yes, the D3 is infinitely better. I have both XM and Sirius on the D3 and love it. The interface is actually acceptable now. Can't say much about I-Pods since I don't like those things but I have heard good things about the interface.