go with the VITAs. i just picked up a pair today, i cant really vouch for them yet, but i put them on my board and strapped in and they felt awesome. Thy are really light, the autocant im sure works, the asym superstrap is really comfy and helps lock your boot in along with the heel hammock. That shit works great. Obviously the gettagrip strap is sick, and the canted highback is sweet.
The Union's toe caps, or should i say straps, are worthless. And the ratchets obviously suck too. Don't know much about the Rodeos but i would say the Malavitas are the way to go. Good for all around with mainly park oriented guys.