The police updated me on Friday after speaking to a witness and they believe the thieves are local from the estate near work so they most likely will be back and if I replace, they will have another go

so it makes no sense to put another RNS510 unit in as I cannot secure my car from attempted/actual theft.
I also spoke to the insurance company on Friday. If I don't claim then they have confirmed it will have no impact on my policy at renewal even though it was a theft. This leaves me £92 out of pocket and minus the RNS510. (£70 excess for window and £22 for new window B Pillar trim on order)
If I claim then I'll claim for the above as well as the stereo surround bevel which they broke the clips off (I have done a temporary repair at the moment)
However, the insurance policy has a limit of £1000 on audio (worth checking yours) so it won't pay for a new one sourced from VW but I have found a company that sells these for £749 delivered.
http://www.advanced-incar.co.uk/volkswagen-rns-510-navigationI wondered whether to claim for this plus the other bits and then look to move the RNS510 on? Should get around £500 for this?
After my excess of £100 I'd have around £500 in my pocket to do what I wanted. I thought about getting a Fiscon bluetooth unit
http://www.advanced-incar.co.uk/bluetooth/fiscon-vw-basic which will work with my RCD310 head unit as it uses the MFD to operate. This will be out of sight and give me telephone use when driving which is a big convenience for me.
Any Thoughts? You can probably tell that I haven't made my mind up yet?
edit: Price of RNS510 is £749 not £799