i dont live in your area , but the only advice I can give is to be sure to install those neo angel corner inclosures in CONCRETE....(if thats what we are talking about)
If you got an old house, the floors could be way , way, out of level
PLEASE USE A LEVEL on the floor to be sure you got a perfect or close to level floor and threshhold base in that neo-angle unit or the install of the shower enclosure will be absolutely a living hell.
And the water might pool to one corner of the shower too and not ever want go down the center drain, without forceing it too with a towel or sponge. (thats a fun thing to discover after the whole job is through)
. 2600 seems kinda high , but I really dont know what you are talking about either, call around to plumbing supply houses and ask them for referralls.