It is good to see BFG fleets like yours coming along.
I have fleets for Chaos and Necrons, and have been working on building ships for Tyranids. I'm also interested in getting an Eldar fleet (although may get killed for playing both Necrons and Eldar

), to match my 40k armies. Unfortunately I have none of my stuff with me anymore to continue building, painting or showing progress.
Have you ever tried playing games on Vassal?
There's a Vassal BFG mod-
http://www.mediafire.com/?b6jjyf1ph7sgmIt's extremely clunky, and can't handle many ships (so escort heavy or ordnance heavy don't fair well), but it works well enough. I've been testing out my planned Tyranid ships before I actually build them.
It's also an unpopular mod- you'll have to organise to meet people for games on there, rather than starting games with random strangers like you can in the main Vassal40k room.