I really like this design. Personally, I think that the struts should be longer. I know that the Burke has the nacelles mounted directly under the saucer, but I'm one of those who disagrees with that design too. Unless the Federation has subject races (like the Klingons) that it stations in the areas of the vessel that'd be contaminated by the radiation. This isn't a styling critique. The model's design looks great. More on the positives though, the impulse/shuttle area is beautifully done. All of the detailing on the bottom of the saucer is original and very nicely done too.
What class is this? It looks like a frigate, but it's armed like an light escort cruiser, possibly? (Lots of phasers.)