I got the RP-Verb and RP-Delay from Rob Papen and I find my self using them a lot! If you buy RP-Verb you get RP-Delay for free. These plugs can be used "normaly" or in some really extreme and creative ways.
I also use Sonitus and Timeless2 a lot for delays, as well as DubStation.
For reverb I love Altiverb but it has some issues with bit-bridging. I hope they release the Windows version of Altiverb 7 really soon!!! But I really like Sonitus Reverb as well. I use it all the time and find it perfect to put on single tracks or in FX Chains if neccesary because of it's relatively low CPU consumption.