Replying to First pair of skis, advice?

Hey so i'm looking to buy my first pair of twin tips soon but i'm not looking to spend a lot of money.  I was looking at a pair of 161 1080 thrusters for $180 a pair of 168 1080 Lab CRs.  I read that the Labs are a more advanced ski and stiffer and less forgiving on landings and stuff but i'm worried the 161s will be too small.  I'm 5'10" and weigh 150.  I'm looking to spend no more than 500 for a full package so if anyone has any advice as to what size ski i should get or anywhere i could find some deals it'd be appreciated.