I am not allowed to post the price because those units are price protected by Raymarine but you can click the link below and add it to your cart to see. The price of the bundle includes a t/m ducer and there is no way to get the unit without it. If you bought a gps-only version and added the DSM25 sounder it would cost the same as the GPS/FF version but you wouldn't get the ducer.
For a thru hull I would go with the Airmar Tilted Element. It is now avail for the A65.[*]
Raymarine A65[*]
Tilted Element Ducer[/list]Navionics will give you a $75 rebate when you trade in your Silver chip for a Gold. Gold cost $181.