I have to agree about the Sur'Kia class, though it looks ok the way you did it. makes it look like it can separate. I personally dislike the "Nose" on the forward part of the ship though, rectangular or triangular piece added there would have looked better.
Have to agree with DJ Curtis on the Sortavala and Pitkaranta class. The Pitkaranta is a great looking Centaur influenced design. Would like to see the Reliants roll bar on it as well, as a variant.
I really, really like that second one. The first looks fat. Very fat. Like... mother-in-law fat. That ship needs to cut the carbs and maybe run a few laps of the solar system at high warp. It's gonna have a warp core breach if it keeps up this kind of lifestyle.
Good one DJ,,,

A cookie for your work, but don't give any to the Sortavala,,,

Seriously, if the secondary hull was closer to the Connie's size it would be an awesome looking Fed design.
Great job on all.