I've just looked up Zorin, as it's not a distro I've come across before, and apparently it's based on Ubuntu, which is what I'm running. Ubuntu has an excellent forum for all kinds of questions - hopefully Zorin has something similar. If you're not comfortable with using the terminal, try to install packages using Synaptic Package Manager, as far as possible. In Ubuntu, I believe you can double-click .deb packages and they will just run, but it's a long time since I needed to do anything like that. I'm sure Stomme poes also runs Ubuntu, and there will be other Linux users about, so if you get stuck, you can post a question in the "Computer Hardware and Software" section of the forums.
I've never used crossover, but I do have [Wine. They have an Application Database, which lets you check whether something is known to run well under Wine or not. Although I've run a few things with it in the past, the only thing I now use it for is the [URL="http://www.visionaustralia.org.au/info.aspx?page=628"]Colour Contrast Analyser](http://www.winehq.org/), which I couldn't live without and which doesn't have a Linux equivalent that I've found. [/OT]
I tried Kompozer briefly, to try to help somebody else who was using it, and I didn't like it either. Bluefish doesn't have a preview as such; what it has is a "preview in browser" option, which I like much better. That way, you know how it's being rendered by a browser, rather than an editor - which is, after all, how your visitors will view your site. You can set one browser as the default, accessible from a toolbar icon, and any number of others which are accessible from a menu.
Another possibility in Linux is Geany, which I've also used. It's just a case of finding the one that best suits your method of working. I like the auto-suggestions for tags in Bluefish - they help to cut down on typos.
Hope that helps.