RE: Am I safe to buy Vortex binos?
Absolutely.
I (actually SantaClause to be more precise) gave my then 11 year old son a Vortex Diamondback 8X42 in Coyote Brown. They are a phenomenal glass for 200 bucks and rival my Pentax DCF SP which cost 3 times more.
The quality of the binos is evident the moment you pick them up. They are nitrogen purged and have a lifetime warrenty. The image quality blew me away for a $200 bino.
The only complaint is the focus ring isn't as smooth as some as you might like but that is a very minor complaint. The eyecups are fantastic.