Eddie TX
There are some interesting verbs in Reaktor, too.  Check the Space Master ensembles, which are similar to the highly regarded Redline reverb. 
 
Cheers,
Eddie
 

Ah I forgot about SpaceMaster, that is a very lovely, trippy sounding reverb.

When I want the sound of spring reverb I use a reverb with a spring in it.

I use PSP SpringBox. It sounds really good, especially if you don't have a real spring reverb unit.

Thanks to Scook I got a new reverb today!!! Meldaproduction's MMultibandconvolution! I've been wanting a good 64bit stereo convolution program for a long time and have been collecting IRs from Lexicon and Bricasti for that future day. This is also my first plugin from Melda. At first glance it seems to be a very complete package.

Like Jim mentioned, I also like the NI RC 48 and RC 24. I preferred them over Breverb which is what I was originally using.

Here is a little tip. There is usually only room for one or at the most two expensive sounding reverbs in any mix. Once you start going over that then you start not hearing them anymore because there are too many of them.
 
A good thing to do is to mix your reverb qualities up a little and have some not so great sounding reverbs in a mix. Sometimes a cheaper or rougher sounding reverb can work better than an expensive sounding one on the same part. (something to remember. A rough sounding reverb will always sound a little better by the time the sound bounces around the room from your monitors to your ears.  ie the room actually smooths some of it a little. Also the brain has the ability to fill in the rough spots too, leave some of it to the imagination)
 
I have got some fantastic sounding spring reverb VST's. They are soooooo good now it is amazing. Saves fiddling around with actual spring reverbs. And who has got those anyway!

Jeff Evans
Here is a little tip. There is usually only room for one or at the most two expensive sounding reverbs in any mix. Once you start going over that then you start not hearing them anymore because there are too many of them.
 
A good thing to do is to mix your reverb qualities up a little and have some not so great sounding reverbs in a mix. Sometimes a cheaper or rougher sounding reverb can work better than an expensive sounding one on the same part.

I got the same advice from Mike Senior's "Mixing Secrets," and I think I might have heard Dave Pensado say it too. Or was it Bobby Owsinski. Sometimes a cheap and nasty reverb is exactly what you want. 

That's funny... what the heck is an expensive sounding reverb???
 
For example; Go price a real life (not a make believe real life) spring reverb unit and compare it to the price of the digital reverbs mentioned here and you'll see how the terms "cheap" and "expensive" are meaningless.
 
I have older tube driven spring units but this solid state example seems like a nifty new item:
 

 
This item seems cool if you really like doing it with tubes.
 

 
 
 

sharke
Does anyone use any of the Native Instruments reverbs that come with Guitar Rig and/or Komplete? I must admit I haven't really explored these fully - things like Iceverb, Vintage Verb, Spring Reverb and Reflektor.

Vintage Verb is actually convolution (with 8 embedded impulses).  It is my favorite reverb to use within GR5.  I am sure VV would sound good on other instruments, but I haven't done so yet.
 
Iceverb and Octoverb are more niche type reverbs.  Each of them has their own specific sound that might be good in certain situations, but I can't see them for everyday use.

Magic Russ
Vintage Verb is actually convolution (with 8 embedded impulses).

Huh? Where did you get this information?  The Vintage Verb webpage states nothing about convolution and impulses.  From his page: "Features: 9 reverb algorithms."
 
[EDIT: Maybe we're talking about a different verb. I am referring to Valhalla's Vintage Verb (aka, VVV, V3, etc.).]
 
With that said, I too enjoy using Valhalla's VintageVerb; recommended as it is very versatile. It is used often.  Also, since I love big and modulated verbs, I have demoed and really like D16 Group's Toraverb. Currently, I'm waiting for that one to go back on sale (as well as D16 Group's other great plugins), but it's already very affordable at $49.