To VVTi or not to VVTi?, That is the question... Options

[TRDCelicaFan]

First of all, hello to everyone. I'm new to the site and so far I like what I see.

I'm from England and looking to buy a 6th gen Celica GT (3S-GE). The only thing I'm not sure on is whether I should grab one with VVTi or without. Whichever I eventually pick, I want to tune it to get the best performance I can. I like the idea of the VVTi model because it sounds like the flashier version of the two cars, but I don't know if it having VVTi will limit the extent to which I can tune the car. Will the prescence of VVTi restrict which performance parts I can use on the car, and how much I can fiddle with these, or the stock parts?

I've had a brief look at some 6th gen Celica parts on the market and the phrase "to fit the version without VVTi" cropped up quite a few times, which is what made me think of posting this topic. Any feedback you can offer on this subject would be greatly appreciated.