High cost of Motorcycle GPS

Can't speak for TomTom's current offering, but all three of the current Zumos from Garmin do what you want.

As to why they are expensive? They sell in very small numbers compared to the automotive navigators.

The higher cost is also likely related to the more heavy duty, rugged construction to withstand vibration, waterproof characteristics, gasoline resistance materials (in the case of the Zumo), higher visibility screen in bright sunlight, inclusion of both motorcycle and auto mounts, increased routing features and other motorcycle specific software features.

And yes, the Zumo will send the navigation prompts via Bluetooth.

I am using a regular Nuvi 265 on my motorcycle. I have it on a RAM handlebar mount, with a Glarestomper visor on it. I carry a plastic baggie in my saddlebag for when it starts raining. The only downside is being able to hear the directions since this unit is not bluetooth.

My next Garmin will have routing capabilities, that is the only thing I am missing.

Using a Nuvi on a bike seems to be common based on the motorcycle forums I read and am active on.

That's an important question and if you decide to get a "standard" model instead of the Zumo, the answer might not be clear.

I have a Magellan that is "bluetooth" but it will only "talk" to a cell phone and not an earpiece. It also doesn't have an earphone jack so I'm screwed for use on the bike.

Buy yourself a Nuvi 550 and save yourself many dollars.

In fact the new Zumo 220 is just a reworked 550, at a lot more cost.

If you don't need the bluetooth go with the 500 and save even more.

I have the zumo 550. Expensive but love it for the bike.