As long as you have all winter, I would recommend getting a kit. Either of the two you have in mind are excellent.
I would avoid the OS 40LA. While OS does make some outstanding engines, the LA Series is weak. Take a look at the TT .46 Pro or this one:
http://www.rcuniverse.com/magazine/a...article_id=153
They are only a few bucks more than the OS, but MUCH better.
You will still need Glues, drills razors blades, etc. for an AFR, but there will be a few more building tools required for a kit. If you can improvise, you won't HAVE to buy everything.
Same goes for a flight box. Start with fuel, and a glow driver, and the guys at the field will help you with the rest until you can get a few birthday presents.