MachineClaw
Are they worth it? 3 -4 plugins worth the price and the rest meh?
It's good solid stuff, but most Waves plugs are not necessarily the best-in-class, IMHO. You probably don't NEED Q10, C1, C4, etc. as the Sonitus/ProChannel plugs are more or less equivalent. As for the others, that's up to you to decide whether you'd make use of them. A quick demo of the plugs will let you know how they mangle your sounds. :-)
One thing about Waves is that they're so popular and used in so many pro studios that it's a good idea to at least be familiar with them. A lot of the tutorials from places like Groove3 and Audio School Online, not to mention free vids on YouTube, make heavy use of Waves stuff ... having them yourself makes it easy to follow along. But still, there are usually less expensive ways to achieve what Waves does.
Before jumping into the Waves (heh), I would advise trying the demo to make sure you don't mind their convoluted installation and licensing system. Also their GUIs can be a little flakey on some systems, with jumpy controls and such, so check those out also. Good luck!
Cheers,
Eddie