If trailering and shallow draft are priorities, I wouldn't rule out water ballasted boats so quickly. Both boats you mentioned are water ballasted ( at least the earlier versions of the C250) and draw less than 2' with board up. That makes launching at a standard launch pretty easy, similar to a power boat. They're much more stable than many here say as well. I have owned an H23.5 ( water ballast) for about 17 years now. It's initially tender, but becomes stiff as it heels to 10-15 degrees. It's not a racer, but does pretty good in lighter breezes ( <10knts) compared to similar sized keel boats. It's a fine boat for it's purpose. It can beached easily, and more importantly, un-beached fairly easily.
Filling a tank with water isn't partially sinking it no more than attaching 1k lbs of steel to the keel, except if the boat does swamp, water ballast boats ( at least the Hunters) have positive flotation, which will keep it from completely sinking. I don't know if that can be said for a traditional heavy keel boat.
Obviously, you picked two water ballast boats that have other features you like. Take one out and try it. As in my case, the benefits listed above outweighed ( or is it under-weighed) the negatives, which are few and often exaggerated.