You sure did some reading on the forum
Looks nice, be sure to post some pics when your installing all the stuff.
Think you made a very good choice with those components. Well personally I would choose a Xenarc LCD, because of better buildquality, but that's only my opinion.
You can always run into trouble somewhere, but you've got it pretty much covered I guess.
Sorry but I can't give you advice on a supplier, being located in Europe.
For the software part, I suggest you try them (all). It's more like a personal thing See which software suits your needs, there is plenty as you can see.