If the briefings and therefore money are the concern go to Minovation. Period. Their hire rates for the Boomerang and Tomahawk are cheaper so you'll probably save a grand or so during the GFPT part of your license. I guess another difference is, and please correct me if I'm wrong, ACFT does both the 150hr and the 200hr CPL whereas Min's only does the latter, if that's of any concern to you.
Unfortunately I can't give offer you anymore info at the moment as I'm waiting to do (and hopefully pass!) my class 1 medical before I sign up and spend precious money on more lessons.
PB, if you do decide to go with Min's would you perhaps be able to do some sort of a write up of your initial experience like I've done here. I think it would be a valuable post for future WA pilots who are in the same boat as you and I.
Jay, do they charge for the briefing times?