http://www.xaraxtreme.org/ - Xara Xtreme is free. Expression Design will not be free after the trail period, will it?

So you will learn it, you will like it and then... bam... you have to pay for it. I've been there with some applications, so I avoid such things like fire. So if you want to pay for it - Adobe Illustrator might be a better choice because it's industry standard. And if you want it for free - Inkscape seems to be the best choice (or you could try Xara Xtreme if you dislike Inkscape). That's just my opinion on this matters.
