Others will need to chime in on gaskets and the DP/MP connection.
As for the intake and tuning, you -might- be able to get away w/ running a Cobb SF OTS map w/ the GS CAI as a hold-over, but with any aftermarket intake it's definitely recommended you get the MAF, etc dialed in via e-tune/protune unless you're familiar w/ the process and have a copy of Accesstuner Race, in which case you can do it yourself like I did. I spent quite a bit of time getting MAF scaling dialed in on my car across the various seasons w/ the GS CAI, and at least in my case the scaling change only somewhat resembles the ~11-12% over stock scaling that several others have reported on the forums. If you decide to go w/ a non-Cobb aftermarket intake and plan on trying a Cobb SF OTS map with it, you should have a wideband O2 installed and the willingness to hawk/datalog WOT AFR or you risk popping the motor running too lean -- and to reiterate, it's not a recommended 'experiment' IMO.
If you stick w/ the -stock- airbox/filter setup, the non-SF Cobb OTS should hold you over. Not recommended to use the non-SF Cobb staged OTS with any aftermarket intake, high probability the aftermarket intake will flow more air than the stock MAF scaling and you'll run lean.
In case you weren't aware, if you get a DP you are considered Stage 2, and should be limiting your Cobb OTS map selection to Stage 2.