The best replacement for sony vegas is adobe premiere.

The best alternatives to sony vegas are rated as following:
★★★★★  adobe premiere
★★★  final cut pro
★★  pinnacle
★★  final cut
★★  premiere
★★  after effects
★★  adobe after effects
★  imovie
★  premiere pro
★  avid
★  adobe premiere pro
★  adobe
★  windows movie maker
★  pinnacle studio
  movie studio
  adobe premier
  premiere elements
  cyberlink powerdirector 12
  movie studio platinum
  cyberlink powerdirector
  ulead video studio
  final cut express
  adobe premiere elements
  sony movie studio
  avid xpress pro
  pinnacle liquid
  premiere pro cs6
  power director
  adobe premier pro

Your alternative for sony vegas is not listed? Suggest!
Speaking about sony vegas, one probably shouldn't forget about after effects.

Other search terms related to sony vegas and their ratings are:

★★★★★ after effects
★★★ dazzle
green screen
You have in mind a companion for sony vegas and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of sony vegas in all years. Click on graph for more.
sony vegas
adobe premiere
final cut pro