FYI I'm 6'0 185lbs and fit just fine in my TE2 (as I would an AP). For TE2 I actually had to trim a bit of material. I think you'll find that about $1000 when all is said and done is a base price. Going "more accurate" from there is sometimes only a few extra hundred dollars, but worth it in the long run if accuracy is that you want, else you'll just end up selling the suit.
Note that AP actually has been known to trim/do assembly for a fee. Also - great suits can be had used much more economically - a fully built (and a fabulously done one at that) TE2 just went on sale for $900. Just add suit, shoes, and blaster and you're done.
Also note that while these are generalities it's your armor in the end. There is no one "best". There is what is right for you, as the build/assembly to your body is far more important in making an effective trooper than the kit you buy.