This one is a no brainer - iZotope's Nimbus Reverb - made by Exponential Audio - who iZotope acquired recently, is a high end algorithmic stereo reverb using the quality algorithms designed by Exponential Audio, is on offer via Pluginboutique at £11.95 - reduced from £159 - I mean c'mon....
Natural stereo reverb algorithm
Warp controls with compression and overdrive
Pre-delay and reverb delay adjustable by tempo
5 additional early reflection patterns and additional plate reverb algorithm
Dynamic tail suppression to lower reverb in louder parts of a mix
Over 1,200 presets (rooms, plates, halls, chambers, and more)