Buying Warhammer 40k (Also, a thread to show off your models)

[Melfice]

So, I'm looking into getting some Warhammer 40k models.
Not for play, however. Just for display. I know: crazy, right? I just love how the models look, and I couldn't care less for the game proper.
I'm mostly looking at Space Marines, but I might be persuaded into Tau instead.

However, here's the thing.
I've been looking at the Assault on Black Reach box, and it looks like a great buy indeed. But seeing as I'm just going for display of one army, I'd be stuck with Orkz that I wouldn't have much use for.
On the plus side, should I ever get interested in more than display, I've got the rules, some of the tools (dice and the like) and two small armies to practice with.

I've also been looking at various battleforces.
Again, mostly at Space Marines and Space Wolves, but the Tau look pretty awesome as well.

The main question is, what do YOU guys think I should do?
Still go with the starter set of Assault on Black Reach or just go for a Battleforce? I'm willing to look into anything BUT Orkz and Tyranid, if I get a battleforce instead of AoBR. (Tyranids look like hell to paint. >_> (more than other models, in any case))

Feel free to also show off your own models/armies if you've got any.
I know I will, when (or if?) I get mine painted!