Most all of your 40 size trainers are good and the engine you chose is a good engine. You'll need a radio and the choice there is endless and will depend mostly on how much you are willing to spend.

You'll need a flightbox;
http://www.mountaincountryshowcase.com/theflightbox/

Then you will need the necessities to go in it the flight-box, the basics are: 12V battery, engine starter, fuel, a fueler (hand crank or electric), glow plug starter, and various screw drivers and wrenches.

Here is a thread that discussed this topic:

http://www.rcuniverse.com/rcarchive/22/2003/04/3/145893