I also like Xen, I like the implementation and the way it all just seems to work. I particularly like the ethos driving development, that's not to say I think it's finished.
Now, say I where to buy a licence tomorrow, I'd like things to look "roughly" similar to how my forum looks now and I would want to do so with the minimum of fuss. So I would like a blogs section, I'd want a sidebar and I would want the theme to look generally the same.
Using off the shelf parts ie mods existing features would this be generally possible and if I would need to install plugins link me to them.
My site is www.the-sps.org