Holy crap, are they worth that much now!!!!
I bought one recently, but I won't part with it.
The ElectroHarmonix Holy Grail reverb pedal is not bad, but it has a reputation for being hissy and noisy. I had to try about five of them before I got a quiet one; I keep it on my pedalboard as a back up.
Before I got the Real Tube Reverb, I had just bought a Peavey Valverb, which is an all-tube spring reverb and vibrato in a 1-space rack. It sounds very good, actually; it's probably the best thing Peavey ever made. They are rarer than hen's teeth, though, and haven't been made for years.
I paid stupid money for it, I thought at the time; I put in a bid that I thought was ridiculously high to avoid being sniped on it at the last second, and got a surprise; I paid $425 for it when I expected it to be about $325-350 or so. But it is in excellent condition and has the footswitch.
This is not the best example, because I wasn't using much reverb to start with and there's delay in there during the solo, but this is a quick excerpt from the first gig I did with the Trio and the Valverb together (excuse the fumbling for chords, it was a request and we hadn't played it before):
I'd sell if for what I paid for it if anyone wants it; I know you passed on it before, though.
Try the Holy Grail, it's not expensive, it might do it for you. If you get it online new or at Guitar Center, you can always return it if it's too noisy.