Here’s my problems with doing the Triathalon now.
1) As I said before, just finish what you’ve started (CFA) since you’re near the end and get that crap behind you once and for all.
2) This way, if you get hooked on the Triathalon / endurence sports trek after the first year, you won’t have to then pause your workouts for a year and lose all your progress while you finish the CFA at some point. I’m big on focusing on one area then committing to it for however long it takes. Since I’ve finished the CFA program, I started marathoning a lot this summer / fall and will be moving to ultra marathons in October (two 50 miler’s that month), then maybe 100’s based on how October goes. I would hate to get into the swing of things then have to scale back to finish the CFA. Just get it done, then move on with your whole life ahead of you.
3) Lastly, and most importantly to me, personally, I don’t think you should approach these sorts of man challenges as resume builders or some sort of checklist. That’s just me. It’s kind of a lifestyle thing, and I tend to be a purist. But if the resume’s a big issue, then I’d say finish the CFA then work on the triathalon next year when you can commit fully instead of putting yourself on some sort of resume driven schedule.