I think you would be fine getting their Standard PCM with added timing, especially if you start using premium fuel. You might even be able to get away with running 89 octane, but make sure you scan for KR if you try it. Some might say that exhaust is in order before you do a PCM, but I think you'll be totally fine running one in current trim.
You'll notice the car being a little more peppy, and I swear I could hear a tiny bit more "pop" in the exhaust note. It'* also very possible that I was imagining it
. Anyway, you'll definitely be able to tell a difference. It won't be a huge boost in power, but you'll get 5-10 extra ponies from the timing, and you'll really like how the motor winds up to 6k before shifting.
I say go for it!