Well if it was me id stay away from the red and gold beings you have that choice if going for lavender, don't worry about the green or purple sheen, you aren't going to see it on lavender anyway.. also you may see both sheens on one single bird, thats not that uncommon to see this on black, maybe even from different angles and the sunlight reflecting the sheen, looks purple from one angle and possibly greenish purple from another angle..
we don't all show birds and so we can run are pens like we like them, as i have a mixed pen of araucana myself which most everybody knows on here..we love them that way..
Thats a personal preference and not someone else's choice as to what and how there gonna pen there birds..
Candy Color is what that boils down to and some like a flock of birds with color and not just a back yard full of a single color or what some call a back yard of crows running around..
as for the tufts in are lavender program they were the easiest to obtain on chicks(% ran about 60/40), been a little bit more difficulty in getting rumplness on the chicks(% is about 75/25 few more hatches yet to go on this side of the program), but we got them never the less with culls to go with both breedings..
Charlie