I am about to tell you something very important, so you should listen.
Based on everything you have told us, you need to be on a ski that is around 170cm. Your friend who is 6'2" is a lunatic for riding anything that small. He should easily be riding a 185 or so. If you go with a 160ish ski, not only will it look ridiculous, you will outgrow it ability wise in about 2 days. DO NOT start off with a shorter ski because you are worried about being overpowered by a ski that is your correct size (170), just buy a 170 right off the bat.
Do not get the silencers, they are a shitty, stiff, dull ski that will not be fun for you. The wood in them is not poppy at all, so doing things like butters, and all around jibbing will not be as fun.
That being said I do have some other options for you...
First off is a k2 Fujative from backcountry for $150. Great ski, super flexy, the 169 would be perfect for you.
http://www.backcountryoutlet.com/outlet/K2S0310/K2-Fujative-Alpine-Ski.html?CMP_ID=SH_FRO002&CMP_SKU=K2S0310&mv_pc=r126
The second is the Armada Pipecleaners on Evogear for $199. Again, a great, solid ski. It is super light and a way better ski than the silencer. If you are planning on doing rails, I would go with the fujative because of the porous base of the pipe cleaner, but if you are more into jumps go with the pipe cleaner
http://www.evogear.com/outlet/skis/armada-pipe-cleaner-2007.aspx
Again, do not make a huge mistake and go with a sub-par ski that is far too small for you. Get the fujative or the pipecleaner in a 169 or 166 respectively and be happy for multiple years.
Cheers,
Ryan