I'll weigh in just because I think I have a good feel for your riding style. You're very comfortable on the SXR, I think going to a foot rocket or an EME is going to be a bit of a shock. That's a big jump. As for flat water I can't really speak too much, but boat chasing I know a little about. You need a stable hull if you plan to ride for any period of time, at speed, and it needs to be comfortable. What we do here in Maryland is not at all like what other places offer, we ride for hours at a time, in chop, boat traffic and whatever other conditions might present themselves. Hence why I always argue that old race engines are perfect for what we do, rather than 3 second engines. I personally think that both of those skis are ill-equipped for what we do, they just don't make sense. The EME is a pure flat water ski, you can use if for other things, but it's not really purposed for it. The foot rocket is short and nimble, and maybe with you only being midget sized it will be less awkward but the ones I've seen in the surf (aside from Jake who is on a different level) spin and flip but don't recover well. Then again your size will probably help in this respect.
Flatwater is a sport all of it's own. I think to have a good all around ski is realistic, but you're not going to get the BEST of both worlds. I personally think that you're going down the wrong path and that neither of those skis will fit your form of riding. I personally prefer the superfreak bad ass for all around riding, and in the surf it almost flips too damn fast, it rolls with ease. Realize too that an average glass ski with you on it, is still going to weigh less than a carbon ski with one of us fatties on it. But if you're set on the Krash why not the JB-1 or Predator? They seem much better for all around riding from what I've seen. You have access to an EME in Kenny's ski, you could ride Jrocks FR2, Jason's Vision, my freak, or Justin's Rok. I'd suggest putting some seat time in before you decide. Just my humble opinion.