Hello Rat,
All the Armor vendors that are listed here: http://www.whitearmor.net/forum/topic/11538-the-various-types-of-armor-and-where-to-find-them/ Are reputable.
Depending on your size, some vendors seem to suit different body style better than others.
I have a ATA kit ... I am 5'7" and 185lbs.
The kit fits very well.
Check out the link i posted above to read up on the different armor vendors.
Some vendors have extended wait times on receiving your kit. In the meantime, most troopers get started on things like BLASTER, acquiring your soft parts IE: Neck Seal, Undersuit, Holster, Gloves, Boots etc .. while waiting for their armor to arrive.
Like I said in your "WELCOME" thread ... Patience is a very good thing to have in this "HOBBY"