I'VE never used the hardware originals, though I have read plenty of good things about them, and these plug-in versions are fantastic.
I have found the Lexicon reverbs great for just giving instruments and vocals a nice room ambience to sit in, a bit of context or body to sit nicely with the other instruments and sound realistic. And for my instrumental stuff the spacier, huge sounds do the job, too.
Tons of tweaking options, very smooth sounds that can be used for just about any kind of music, and I can highly recommend them. Clearly, Lexicon put a lot of thought and work into them.
Along with Waves' TruVerb, these will be my go-to reverb plug-ins, and the usual Thomann price and service was great as ever!