That's some nice work on the textures. My only suggestion is to maybe tone down the red a bit since Fed ships tend to have a slightly darker shade. You could also modify the phasers to have a pointed 'end' to the arrays.
The Nova and Prometheus had those types so it could help set this one further into the era. I still wouldn't put the Connie that far into the future as they would've surely retired the old bird after the Dominion War. Of course, it never hurts to get creative.