Considering everything you posted plus the stuff from before, that's quite an army. You got an estimete how many points you have?

Also, any ideas about how you'll finish the bases? Just curious what you'll choose to complement this colour scheme

I did my main battleforce as fleet Leviathan, and over 3/4 of the models, I've colored as such. However, the only 2 things i've bought brand new was the battle force and the Trygon. All other things I've bought on ebay and or converted. If they were not painted or just primed, I colored them as fleet Leviathan being bone white and purple and pink. There was a number of things that came maroon and black so I left them, i'm guessing that is another famious fleet color set. There are a few odd balls, like the hive tyrant with is white black and orange, I painted my only tyrant guard, green and white and black. But I think the rest are Leviathan or that black maroon combo.

Total I have *this is a little guessing as I'm at work* 1 hive tyrant, flying/not 1 trygon, 1 marloc, 2 carnifexs, 1 tyranid prime, 1 zoanthrope, 1 custom Doom of Malan'tai, 3 Shrikes, 9 warriors, 3 biovores, like 20 spores, 1 tyrant guard, 32 hormagaunts, 16 termagants with devourers, 25 termagants base, I think that is flesh borers? and like over 36 genestealers and 1 broodlord. I have to buy just a few more units, but not alot more if any, cause it seems against anyone is almost instant death in 6th ed. Also people seem to have a different view on the rules every game so its a constant fight just to play. GW cant even get their crap straight cause they seem to bring out new rule addons every month or so.