GhostOne, you have a lot of stuff going on there. While the preloaded maps are a good start, they are not necessarily helpful to your particular setup. A custom map (tune) is definately required.
We have debated what fuel cut is since the MSP's first rolled off the boat. My personal opinion is that the computer recognizes the denser air and dumps a truckload of gas into the cylindar in hopes of flooding that stroke (or strokes) and preventing a lean out. When the car bucks, the black smoke out the back of a catless pipe is amazing. It's good to know that the $3.50/gal just gets blown out the rear like that!
DO NOT lean out the A/F's in your custom map.
As far as joining the zoom zoom boom club... we are actually looking for new recruits! lol j/k. Unfortunately, with all of your mods, you need to understand that on a long enough timeline, it will happen to your car. You've put alot of money into this car, how long do you plan on keeping it? Two more years? Five? Ten? Until it blows? Know in your mind that anything above stock runs you the risk of popping the block. People have run higher, myself included.
As far as the wideband in the car, I don't think it's necessary. It's kinda like a radar detector. Unfortunately, by the time your radar detector goes off, the cop's already got you. Only reason you would need it in there is to set the tune in a real world environment. The tuner in your area should be able to do that already. Going with a tuner in your area will be your best bet to prevent kabloooieeee.
Hope that helps!