Carl Zeiss Distagon T* 25 mm/F2,8?

Hello all,

I'm slowly settling down with pentax after buying the k5 a few months ago.

I like the camera so much, that I'm more and more motivated to make pentax my only camera system and sell the rest of my Olympus gear.
What I'm looking for, is a véry good landscape lens.

For me the 21ltd is a bit too wide, I would rather settle on a lens in the 25-28 region, and the Zeiss 25mmf2.8 caught my eye.

Manual focus, which I'm experimenting with anyway at the moment (K-lenses), is no objection: I mean to shoot at f8 mainly, and mostly at infinity.
The lens however is pricy for a prime.

Anyone out there that has experience with this lens on the k5, and caring to share observations?

b.t.w.: pentax has things going for them: a new Dslr on the horizon, a present Dslr that needs no replacement actually, a 560mm prime coming, a limited standard zoom with constant aperture planned for 2013. Really nice to be in with pentax.

thanks
Chris