Your main issue with the 09+ engines will be the VVT. I think the aftermarket control systems have gotten better, but it can cause more headaches than it's worth. Really the main difference between the new and old engines is the heads and VVT. You're only talking ~40 hp difference between the two, which is pretty easy to make up with a few upgrade on an older engine, but new ones might be more available in junkyards too.
