I found the New Blue stuff to be very buggy on my system, so I can't recommend it.
I do use all the BorisFX and Sapphire OFX plug-ins, and I also have the Red Giant Universe plugs, the HitFilm Ignite Pro set, the Digital Film Tools filters, and Neat Video. Rampant Design has some interesting effects and transitions that you can use in the edit page as composites, and some are very effective.
HitFilm has a free package you can try at no charge, and there's some interesting stuff there (and the price is right).