I agree with getting a basic radio for now. Reason: you won't be able to use the extra channels, dual rates, ect. while you are training. The buddy boxes only make use of the basic controls. Most 2nd type planes don't use flaps, or retracts which is mostly what the extra channels are for. By the time you are ready for a plane that has these on them the computer radios will have more features, be easier to use. It will also be cheaper because like other electronic products the prices are dropping all the time. If you need extra servos a standard Futba servo is $14.00 Can. at Great Hobbies. I have included the link below for you to check out. There prices and service are hard to beat. Go for the Thunder Tiger engine, even if it costs more. You will be glad you did the first time you run it!! Theres nothing more frustrating than having a finicky engine. My first engine was an OS 46FX, expensive but easy to run and awesome power. It still runs like new and has out lasted several planes after 6 years. A good instructor will save your plane many times over while you learn how to control it so its not likely that the plane will end up spialling into the ground. [8D]
http://www.greathobbies.com/