Yo Short Fuze:
You know, your question reminds me of a golf student who asked his Pro, "How can I hit short shorts that BACK UP after they hit the green?"
Well, the Pro said, "Do you always hit long of the pin?" The student said,
"No, I always hit short...."
"Duh," said the Pro...."Why do you want to make the ball back up then?"
I had a "spring" reverb, by Motorola put in one of my cars, way back in the 60s. It was great.
However, why worry if you use a spring or a digit or a "fenukian" for reverb?
Most DAWs come with built-in reverb, as do the PC programs; Yamaha makes the best reverb sounds, in my humble opinion; however, I've used Alesis reverb for a long time, as well as Lexicon.
So, go to a vendor's joint and listen up to reverb; it's really a talent to get the "right" amount of reverb into a vocal, or the band, or a single instrument, or a hand clap. Reverb excellence comes from Practice, practice, and remixing.
So, have fun. There are many excellent verb units out there for outboard as well as very good reverb for the DAWs.
Green Hornet
Happy Spring in the Midwest I hope!