The Lego Star Wars Tantive IV (also know as the rebel blockade runner). This baby comes fully loaded with eleven engines, a hammerhead cockpit, escape pods, and even rebel scum.

I've always liked the Blockade Runner and I wished it had made more appearances in the OG Star Wars films. The eleven engine tail gives one the impression that this thing can really punch it, and the hammer head cockpit gives it the appearance that it's supposed to smash through things.
The lego designers really did a great job with this model. The tiny technical details really help give it the Star Wars feel but I think the engines are the real highlight. The fact that lego put in all eleven engines is really a testament to staying true to the original design. Sure not everything is perfectly proportional but it's close enough.

Six moving turrets, two escape pods, an opening cockpit, and an opening fuselage give this ship a lot of functionality. My only reservation is that it's hard to find a good place to hold this model. There are so many tiny details that you have to be careful not to grab a weak spot when lifting it. This kind of gets in the way of running it around the house making "pew pew" sounds. But alas maybe there are a few things I have outgrown.
Now if you will excuse me - Pew pew, Neeeaaarrrr-Kaboom.