Check out the ValhallaDSP line of plugins. The all have fully functional demos, and cost only 50$ each. I've got all of them and have nothing but praise to say about them.
- Valhalla Shimmer - reverb with pitch shifter in feedback path (inspired by Eventide). Ambient heaven!
- Valhalla UberMod - multitap delay that becomes chorus, flanger or even reverb, depending on settings. Very unique design.
- Valhalla VintageVerb - extremely versatile and good-sounding reverb inspired by HW processors (Lexicon and such)
- Valhalla Room - another useful and versatile reverb, perhaps with less "character" than VintageVerb. It does not emulate quirks of hardware, rather it is based on an "idealized" model.
hope this helps