I think the negative comments about AppleWorks come from two sides, really.
1.) People who liked AppleWorks, but over the years saw that development had stalled - or rather _ended_. Clearly, Apple intends to replace it with iWork - but that's not a full replacement just yet. Still: If you're working with AppleWorks _now_, I'd suggest to continue doing that. You can already jump over to Pages for word processing. I personally find it a good alternative.
2.) People who were looking for a nice, complete, cheap office package on Mac OS X. AppleWorks just wasn't up-to-date in recent years. It didn't use the latest technologies OS X offered, rendered type differently (which made it look awful compared to a native app like TextEdit) and overall just didn't feel like an OS X application. To move to OpenOffice or NeoOffice would, of course, worsen that effect, since that either depends on X11 or Java - both of which don't make an app feel exactly like a "real" OS X application.
So... Move to OS X and take a look at how things work for you in AppleWorks. Get a trial version of iWork to look at how Pages handles your wordprocessing documents (some reformatting might be necessary - as with any transition to a different wp/layout app...) and where it could help you beyond the capabilities of AW. There are lots of options, really. I wouldn't totally rule out Microsoft Office either. We Mac-heads might despise Microsoft for many things, but MS Office is a complete package that works for many things just fine. Its formats are not to go away for some time as well.