In my sisters army i use whirlwinds with forge world rhino side doors and front plates, also i have a sister coming out of a hatch that i got from a immolator sprue.

So the whirlwind is dolled up to look sistery, will this be acceptable in tournaments? (not specifically the GT, but maybe lesser tournaments that GW do such as conflict)

It's not that i am being cheap (as with the doors and the whirlwind it is the same price as a exorcist) it is that the exoricst models look damn ugly. Can i use them in tourney play?