Recognizing that I am right brain not left,not to sure what that means mate,anyways just been over to have a look at the quad you speak of,it looks like a nice bit of kit but not sure it's really for a first timer like your self,plus it's not the cheapest out there and if your going to teach your self to fly a quad thats a lot of money to put into it IMO.
Have you tried a good RC flight Sim yet? some of the better ones have quads on them now so you can get use to them first,plus you don't say how you got on with the Bixler apart from saying you modded it for months,i guess you can fly that well then.
If it was me i'd go with something a bit smaller and get use to flying a quad first and once i thought i was good enough i'd then step up to something to do FPV on,i'm just saying what i would do but it is up to you at the end of the day,as you know this hobby isn't cheap on the pocket.
Why not try something like the Turnigy micro-quad as thats a PnP (plug and play) so you will just to add your own battery and receiver and see how you get on from there,or try the ladybird quad and yes i know there small and won't be to up to doing good FPV but they will help you get use to flying a quadcopter.