Firstly if I don't mention it here I would use the same thing or compairable... and keep in mind my situation may be different than yours. For example I take my Pheonix Extra 300s to the feild completely assembled in a Ford Expedition. If you are putting this in a Mini Cooper you may not have that option.

Switch: Consider an [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=JRPA004]MPI type[/link] switch that allows you to charge the plane without removing the canopy.

Battery: 2500 Mah is a lot for this plane but digital servos use more power. Ensure you have a charger that can handle it in a reasonable amount of time. 1500 ish Mah is plenty if you go to a good analog ball bearing servo.

Engine: The Supertiger engines are not my favorite but I have found the "Italian" made ones run really good. I have two including a 90.

Servos: More than you need but that is your choice.

Fuel filler: More things to go wrong. [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN115]Fuel Dots[/link] rock!