I probably will regret answering but I am just going to shoot straight from my own personal experiences and say if it were me I would pick a Crown over the dreamline if my goal was 100 yard moa groups. This is just my honest opinion.
The dreamline series was not created as a 100 yard pcp they because of public response released a more powerful version in the power pup edition and people shooting slugs at the time but it was not intended as a long range iteration in the FX family line up. haha
You stated that cost was a factor so my practical choice to achieve that goal in the FX lineup would be (used or) a new crown vp edition. for around 1300.00 or so. Maybe I am biased lol I own crowns (mutiple) , a dreamline and multiple impacts so I personally just favor the dreamline for 60 and under and crown or impact for over that without pushing the pcp to hard or making it do something it wasn't designed for.
I hope maybe something in here helps you in a positive way and if not I wish the the very best and hey at least I tried haha.