My studio rack has a TC MoneXL, a TC Voice Prism, a Boss VF1, and a Boss SE50. I wanted to add the Lexicon, but rack space was limited, so I ended up using two 1/2 rack units for more versitility. I use the TC for reverb, and the 2 Boss units are great for chorus and delays. The Voice Prism is usually deicated for vocal harmonies, but can be patched into the effects buss as a 4th multi processor too.

This Lexicon is a great unit ... I just have no more room for it. I'll try to post a picture of the set-up soon.