Another great plug in for ambient/spacey sounds is Diffusion by Surreal Machines. Also it's currently on sale for €25 instead of €49.
"DIFFUSE is inspired by classic hardware delay and reverb effects from the 1970’s and 1980’s. It takes a Surreal Machines look at the frontier between delays and reverbs.
DIFFUSE is an analog/digital hybrid - an analog modeled delay fused with a classic reverb design used in early digital units.
In DIFFUSE you get more than the best of both worlds - you can morph between delays and reverbs, and find all kinds of fantastical sounds in between the two. You’ll also find plenty of nonlinearities and smooth tape-style delay changes.
DIFFUSE gives you complete control over smearing, echoes and damping in the most intuitive ways possible."