I think an Ace should do pretty well.....you can play in it (shit, no flatwater loops though), catch bigger (well, flatter anyway) waves than in today's generation of playspuds and it should have enough speed to get to where you need to go. Im pretty sure it would be noteably faster than an EZ.....when I paddled some higher volume stuff last spring, friends in Aces were getting places and making moves (crossing the river) faster than I could in my Space Cadet...at the same time, they were getting squirted all over the place and I never did. Why??? No slicy stern to catch and squirt.
What you have (Ace) seems like a pretty good choice...plus, its pretty low volume, meaning that you can melt through big holes that a creekboat might get stuck in.
Guska's idea about the ez is good......great boat in most any situation.