New from the mailbox

I bought a really cheap assault on black reach dreadnought from eBay.
I got an dilema, should I paint it up for my grey Knights or salamanders?
If I'll put him in to my grey knight list he will get two autocannons.

Or I'll wait until the new space marines codex comes out (as the rumours says, next month) and see if he will be of any use there. Maybe he can fit in a sweet list with the other dreadnoughts it will be my 5th one.
The time will tell.
Good night guys! /Fillee