Well, I guess it just comes down to whether you prefer running a solid half-marathon with no problem, or gunning for the 26.2 and risk things getting rough. Although running a fast half-marathon would be fun and you could recover pretty easily from it, but completing a marathon is a great feeling and you feel at least somewhat good about the fact you ran 26 miles, even if you blow up the last few miles.
I ran my first marathon when I was 18 (i'm 22 now), and I fell apart really bad the last five miles. I had pretty much been doing the same thing I did in high school..around 50-60 miles per week. My longest run in the months leading up to it was about 12 miles, but for some reason I felt like I could handle 26. I made a very stupid mistake and ran the first 11 miles right at 6 minute pace, then slowly died over the next several miles. By the time I got to mile 21 my legs were completely gone, so I basically spent the last five miles just focusing on putting one leg in front of the other and not walking. I know I dropped somewhere close to 8 minute pace towards the end and finished in 2:56. However, as bad as it was, sitting on that sidewalk after the race stuffing cookies and fruit in my mouth was the best feeling in the world, and I knew I would grow to love the marathon distance.
What I'm trying to get at here is that it's not always about running an amazing time. The experience of doing certain things, even when they turn horrible, can change your perspective and I believe lead to success in the future. I know you've probably put a lot of time and effort into your training and want to get the most out of it, but sometimes you just have to throw caution to the wind and say, "what the hell, let's give it a go." Your training sounds perfectly fine as far as completing the distance, it's just a matter of how fast you do it. If you're not looking to run a blazing time, just run the full marathon. What's it going to hurt? Sure, you'll probably be walking funny for a few days afterwards, but as i'm sure many people on this website could tell you, completing a marathon really an amazing feeling and something you can be proud of.
So, I think you should highly consider it, but just make the decision for yourself. If you want to run a fast half-marathon, that's great, more power to you. If you run the full marathon, that's cool too, just pick one and enjoy it. You know your body more than anyone on this message board, so listen to you body and let it decide for you. If you do the full marathon, just remember to go out slower and start taking in fluids early so you don't crash and burn! =)