H1b Visa Extension: Suggest Dropbox@Chennai or attend Visa Interv in Jamaica/Canada

[forumusername]

Hello all,
I need to go to India this November. I am eligible for drop box as I am staying with the same employer since last stamping and my current visa is expiring by coming october. I am working in EVC model in the same location of my employer and will have all proper employer & client documents.
Would like to know, what is suggested in my case? Using drop box facility @ Chennai or going to Jamaica and get it stamped in advance. How risky is drop box facility and is drop facility really a good option for me?

Thanks

[forumusername]

Please provide your suggestions