Okay, you guys are kinda freakin me out now
Actually vBulletin rocks. There is no other forums software that is it's equal. The hacks are fairly easy to install, but the downside of that is when there are updates and you have to upload the files again (which is quite often) - that also means that you have to reinstall all your hacks - which can be rather time consuming.
It takes a bit of trial and error to customise it, but it's all good.