feeling bereft

Since I finished my cardigan, I've been a bit listless.. not really sure what to do with myself in my spare minutes. I picked up my socks and did a few rows, but I think I have the bug for bigger things now - whether I have the stamina remains to be seen. I'm still keen to do the SKB and have the pattern ready and waiting, but finding a sub yarn has been a big PITA. I've also been pretty keen to do one of the following 3 as well. The one on the far left is "Samus" from Knitty. The middle is "Kepler" which I downloaded somewhere along the line but can't remember where (I'm sure the pattern itself will tell) and finally "A Cardigan for Arwen" which is by Kate Gilbert and published in Interweave Knits... not sure where I'll be able to track down a copy of it, but I'm sure if I get really keen I'll find it! I *think* I'm leaning towards Samus.. the pattern is easily accessible and the wool is reasonably priced and I can order online. My only other concern is whether I'll be up for the challenge.. it will definitely be the most complex piece of knitting I've attempted... hmm will ponder further I think.