So you want a Reverb processor that sounds natural and unobtrusive, without having to dedicate 4 TDM chips to run it? Seriously, if you want to step up ALL of your sounds the Universal Audio Digital series can't be overlooked. Now available in an external FW800 processor as well as the PCIe card systems, the dedicated hardware runs UA's emulations of many beloved hardware units - the difference is they sound the same as the hardware - I'm not kidding and I stated to my Sound Production students "Digital has finally arrived." Check out my review of the "DreamVerb" modeler - you can hear it in any one of my mixes since June 2011.
P.S. No, I don't own shares in UAD - but I wish I did!