What to knit?

I feel tempted to knit something more "serious" than scarves and capes, so I bought April issue of some Polish knitting magazine and found there four very nice designs:



I love the green one and the chocolate brown one, white one is interesting, and the red one - I had in mind a design similar to this one, so I probably try to alter the pattern and base my desired jumper on it.
Which one would you knit? ^^

And do you remember my question about the three lace pieces I knitted?
advice, please!
I'm blocking them now and I want to transform them into something.
Thank you, Lobstah and Desi for your suggestions. Any more ideas?