I know exactly what you mean,even subsidising X-Wing with eBay sales I've spent way more on X-Wing this year than I thought I would.
The other two games do look good - but I could easily see myself ending up with a box of unpainted, rarely used models again, so I'm going to stick with X-Wing. I think every expansion FFG has released for X-Wing so far has improved the game, and pace of the game & speed of play is just perfect.
Armada comes painted, except the fighters, and they're too small to pain I reckon. I actually don't think Imperial Assault needs painting - the different colours for the sides look pretty good. Have you even played Zombicide? That comes with colour coded minis and I'm happy with them unpainted.
Edited by mazz0