new edition

So guys, after retiring in 5th edition simply due to a lack of potential opponents, the local hobbyshop has created a WH40k league much to my excitement. My eldar aren't quite what they used to be, with the loss of a few units since the last time i've played. The league is played for fun, but...

Hello. I am thinking of getting back into the hobby after quitting around 2 years ago. Since then it would appear Grey Knights have had a re-release and we are now in the 6th edition. I do have a grey knight army but they are the previous generation metal models. I'm looking for some advice...