I would like to recommend Sirdar Crofter DK.
I knitted my hubby a jumper in it with a matching beanie hat for Xmas.
I loved knitting the yarn, it works up beautifully with the added interest of watching the colours develop. It is soft and cuddly to wear.
Best of all my hubby loves them and has been wearing both ever since. (Which as we all know is not always the reaction of hubbies to knitted pressies!!)
I tried this as a quick knitting project whilst staying with DD recently. I was disappointed and after knitting half the front of a 3 year old ballet cardigan, unpicked it and took the unopened balls back to the LYS .I even gave her the started ball for a charity case! I think the word fair isle effect is misleading. In a small baby size, the pattern would probably be more symmetrical, but in a larger size it just looks a complete muddle. I had deliberately avoided these yarns as I tend to be a bit old fashioned about quick fix things ( eg instant yorkshire puddings) but I though it was time I
moved into the 21st century. I should have stayed where I was!