Dreamline is too far away. Crown is available now. Dreamline promised, can't pre-order yet as far as I know.
There will always be a new gun we can wait for, but if you keep waiting, you'll never shoot. Plus, to be honest, I don't want to be part of the first years production as design flaws will show up and FX will fix. Wait for others to take the hit for design issues. The Dreamline will suffer from some minor design flaws and my bet, having the right parts on hand to provide you with the choices promised. Building a Dreamline in 4 finishes and 3 calibers is very different from building multiple stocks, calibers, configurations, and such. So many more parts to keep in stock and make sure are available for people to buy. I'd wait till they have time to work out kinks and have stock on hand. Just look at the Crown, it's been out for over a year and they are still catching up. The Impact took a couple years to really catch up to demand.
Buy now wiht a known product, upgrade later if you want. Shoot now, don't wait.