My pre-production vocal chain is totally different than my Post-Production vocal chain. For pre-production I just use a vocal chain pre-set that comes with Sonar. It has EQ, Compression, Echo, and Reverb. That just serves to give me comfort when recording the lead vocal. Sometimes I add Autotune as the first effect so I can hear how close I am to being in tune. With the Autotune and the Sonar vocal chain preset I get no latency. Once I have a recording I like I use a different set of effects for post production. I may still use Autotune cause I don't like Melodyne since I may comp a few lines that I hear differently as the song progresses. In my post-production chain I start with a Sonar noise-gate, Sonar Compressor, then I usually use iZotope Nectar modifying whatever preset I use but most have compression, reverb, delay, de-esser, saturation, and eq. I finish by adding another compressor to keep the vocal levels tight. I usually copy the lead vocal to 3 tracks with a hard left, hard right, and hard center. Then those tracks are routed to a vocal bus. I may play with the effects on the Left, right, or center tracks but the core effects still remain on the vocal bus. Anyway that's how I do it.