Ron, I think you'll be happy with the 12" AK, but I haven't yet decided what niche it fits into.
Don't get me wrong, I like it, but remember I'm 5'4" with size 8 shoes and proportionate hands. How it fits you will determine what you see it being useful for.
I feel the extra heft of the 12" AK adds some usefulness, but the short length reduces it's abilities at the same time.
If you think of a foot long bowie knife as the equivalent of a SAK ( swiss army knife ) in managing to do just about anything that comes up fairly adequately, then you can think of the 12" AK as equivalent to a multitool like the leatherman, which does the same thing as the SAK, but is built hell for sturdy and you don't have to worry about breaking. You might say the 12" AK is my favorite knife to have around when I didn't bring a real knife. Good tool, just not #1 at any particular thing other than being there.
The 12" Sirupati is a completely different ballgame than the 12" AK. Now THAT ( the baby Sirupati ) is one very scary knife. Forget the Fairbairn-Sykes, the Randall #2 dagger, or the Applegate-Fairbairn. Ghostsix once said that in a zen sense the knife will teach you. If he's right, I'm not so sure I want to know what the baby Sirupati has to teach. It'll do any chores about as well as the bowie will, but that is besides the point. The AK is a tool. The Sirupati is a pure premeditated weapon.
Let me know how the 12" AK feels when you get it. I really want to know what other owners feel about it. Rusty