This was a bummer, even (k) from the sista site its not worth the trouble for me cause to have a juicy silicon collection of plugs then switch to rosetta, eh! Last time i did this more then half my native plugs vanished from my logic pro plug in manager and upon shutting Rosetta off logic had to rescan all the plug ins agan!

 

Logic X has a stock vocal alignment function that works great. I don’t think you need to go through all the trouble of switching to Rosetta for a function that it’s available for you.

watch this

 

Looks like you made up your mind. Why bother asking people over the internet then?
As for your question, if you can't afford to spend on either vocalign or waves legit sync vx, its all a moot point. Shifting to Rosetta is the most economical way if you have a bunch of vocals.