Just finished the core sections on a 7.5mil volume ship, with the modules I have installed, it comes in at ~250K health, and just over 1mil in shields. The top speed is somewhere around 1.5km/s, and I've succeeded in boosting it to 6km/s (though that's just asking for trouble in something this size :P).
Really, the thing that makes me happiest though is the 40K continuous DPS it has in ~5.5km lasers (which have auto targeting), and 50K+ burst in 11.5km Railguns (every 10 seconds). I've yet to find an enemy that takes longer than 5-10seconds to shred, and picking off the smaller ones with the railguns while the lasers kill anything that comes close is really satisfying. Still not totally happy with the aesthetics though... the bridge just looks off somehow :(.