Here you go.

Having something stolen is awful but look on the bright side, it has made you post on one of the best sites on the web, instead of just lurking.
Welcome home.
As for your choice, the 50v is a great machine and often is more stable than the 51v.
WM6 works well on it also.
All in all a good decision.
You can get some pretty big cards now, but having a few smaller ones is good too.
Be very careful of Cards from ebay, lots of fakes.
I find it useful to keep all my cab files on a card that travels with me and an extra backup of my system kept separately, so that if it is lost or stolen I still have the option to restore my settings on a new device.
Have a look through the storage card forum, that should give you some good links to reputable sellers.
Enjoy your new toy, and all the best with your new business.