Thanks for the T-Racks shout outs. Personally the Brickwall Limiter and the White 2A would fit your needs.

I'm surprised Ozone5 and Fab Filter haven't been suggested. It always seems those two along with T-racks are among the favorites. I would be interested in EZmix2. It looks pretty sweet.

I'm surprised Ozone5 and Fab Filter haven't been suggested.

I'll second that suggestion. For getting good results with minimal effort, Ozone can't be beat. 

I'd go for Fab Filter Pro L if I was looking now. I should add that I haven't used it but the people I trust here and there on forums seem to use it now and really like it. It hardly ever comes up individually for resale and they don't feel the need to reduce the price because it's obviously selling well and holding its own. Worth a look.

I use T-Racks Limiter, Elephant and Ozone 4. You can get Elephant cheap secondhand and T-Racks stuff is often on sale or secondhand too!

How do you buy a plugin secondhand?

Go to the Market Place  forum on kvraudio.com. It's weird some of the great stuff people are unloading there. I think they buy a new compressor/limiter/reverb/synth every week hoping it'll be the magic bullet, only to find out it's not and move to another one.