Hey Rob welcome to the FISD, great to see another FOTK joining the ranks.
Looks like you've been given some advice so far. I think you'll like the ABS version of the armor, a little bit more complex to build but worth it in my opinion. There's quite a few post and present build threads you can follow not to mention many experienced builders here to help, so you're in good hands here.
As for paint, myself as well as a few other owners went with the more expensive professional paint route for durability and overall look. This is not mandatory by any means, just another option. If you're interested to know more let us know.
Anyway, looking forward to your build