You can find a fully assembled E-11 on here for cheaper. I know Darth Voorhees is selling them for 175. http://www.whitearmor.net/forum/topic/27284-dvh-assembly-finishing-service/
TKittell offers belts for $33. http://www.whitearmor.net/forum/topic/19803-fs-white-canvas-belts/
The holster looks iffy, and its an ESB variant. I got my fully assembled ANH E-11 holster from Darman. http://www.whitearmor.net/forum/topic/16744-leather-e-11-holsters-35/
I'm not sure about the neck seal, it looks like a hero variant. I got mine off trooperbay for about 50 and it is fully woven, no leather. http://trooperbay.com/stormtrooper-neck-seals/
As for the armor types, ANH Stunt is most popular one seen in A New Hope. It features a long, grey frown, hand painted decals, flat dark green lenses, and latex handplates.
ANH Hero is an ANH Stunt with a shorter frown, bubble lenses, different style ears, and different neck seal.
ESB is an ANH Stunt recolored with a black frown, vinyl decals, different style holster and clamshell handplates.
ROTJ has so many differences it is hard to cover here,