@Boydie - I agree, I'm quite put off by the majority of new Plugins, Waves are very good indeed, but many folk relate price to quality, which just isn't the case, there are a number of very good free plugins.
For what it's worth there are a few Waves plugins that I couldn't be without, Brauer Motion, Doppler, Smack Attack is a recent find, recommended by someone here.
The only slight Issue I have with Waves stuff is that they are quite CPU hungry, but I can norally live with it, some of the Abbey Road stuff is laden with eye candy graphics but does weigh it down.
The Plugin Doctor is really an eye opener, and an essential tool for me.
Paul - Take a look at the SSL X range on Plugin Boutique - they are very good plugins, lightweight and should fill a gap in the plugin cupboard, the x Phase and the x valve comp, along the x echo are really very good, and simple to use...and currently on offer < £20 ea. (I think the echo is slightly more).
btw Studio One is just very very useful, getting used to it now, do you export to Notion much?