Whoa, loads of responses. Thanks peeps!
Right - the bow seems to be the most contentious part fo the design. I didn't want to change it at first - I liked the angular shape. It did look very low-poly though, so I changed it reluctantly. However, I do like the new one better now I look at it, so I'll be sticking with that shape (It took me bloody ages to change it anyway, so I'm not changing it back!).
As for the central hull, I've not done much to that yet. The idea is that it's going to be broadly similar in shape, but with a lot more detail. There'll be gun batteries down the sides, giving it a sort of "ribbed" pattern (I'm sure KT will have something to say about that...

), and there'll be some more sturcture on top. I may also make it more of a trapezium-type shape, a bit narrower at the top, and a fraction wider at the bottom.
On the bow, there'll be a large sensor spike coming out of the very tip (where the gap is now), and another on one side about halfway back and up. There'll also be a heavy beam cannon somewhere on the bow, and an observation deck/sensor cluster underneath.
I've not worked on this over the weekend - been busy - but I'll post an update later today or tomorrow.
Thanks for all the comments - they're very useful.
