The Worlds are almost over. The V-SPec did Great. and So did the 421B.

Between those two motors I would go for the Top 421B. Anything in this hobby is touch and go. One moron gets something, doesnt treat it right- breaks it in some cold method, shoots a rod through the side of the case- leaves a bad taste in everyone elses mouth. (LoL- J/K Grahama)