I would also suggest you try a couple of zenith boars, which are right in between semogue and omega in terms of splay/backbone. Their knots are also a little more densely packed.
I can't say I like the huge omega pro brush, just to unwieldy. I also would not recommend any omega under 55mm loft.I recently got one of their 24mm/48mm boars and it doesn't splay at all!! I mean, it's just unusable!!
Cheers @nav1