Not that I've got a whole lot of say, when I was choosing between contracts and I took my time to think about it I ended up coming to the conclusion of. Why, if I want to end up SF, would I not give absolutely everything that I've got to acheiving that. They've got the option to do it, and people succeed. I had in my head I may be looked at in some sort of 18x guy off the street I don't belong here. I got over that by telling myself, if I belong somewhere and I give everything I've got to give and am selected, there is a reason I made it. Having come from anywhere, if you're not right for it, you won't fit.
I chose 18x because that's where I wanted to end up. That and I also realized that the Regiment isn't some stepping stone, and that going and working just with the mindset of "I can't wait to get out of here" milk them for all their techniques and bail on my guys. That wasn't for me. From what I've been told, you'll learn SUT, you'll learn your nav, you'll learn everything you need to learn. That's what the Q course is for anyway, learn it from the guys you'll be working with.
At the end of the day it's your decision, but when I said my 18x contract I haven't given it a second thought and I can't wait to begin the process, I'm sitting in meps right now waiting to ship to Benning tomorrow and get everything started.
Take your time and think about it. Your answer shouldn't be something you heard on a podcast, because what works for someone doesn't always work for someone else.
Good luck in your process.