I think you'll do fine with the skis. Esp. in 160 it's still a well behaved one. I wouldn't worry about it, if you spend a lot of time on them, you'll only get better and they'll grow on you. The ski is a good choice, it will keep you on your toes and you're going to improve. You want to push yourself and that is great.
My point about the boots is that you might want to go with something stiffer and beefier to fully unlock the ski's potential. I'm just speaking from personal experience. A while back, I bought cheap comfortable boots and I couldn't control my skis at all. My foot was loose, didn't feel the ski or the snow, couldn't articulate the turn properly (which you need for carving on the edge). This resulted in terrible timeas and moreover in dangerous skiing with a significant loss of control. I fell much more ofter, once almost broke my ankle in the boot.
In three weeks I went back to racing boots and will never go back. True, they are less comfortable, getting in and out can be a (big) pain but the trade off is well worth it. (And if even my parents agree after they sabotaged 5 years of my effort to put them in good boots
, there's something to it)...
Point is, not every four buckle front entry boot is the one for skiing the GS:11. You always want to have boots on par or even a notch above the skis, it's the boots that do the most movement and power transition from you on the ski. If you don't like the "soccer in slippers" analogy, there's another one:Try playing tennis or fencing with oven mitts on.
I guess you're set on your combo, which is fine with me, but if I were you, I'd at leat give it a try and spend a while skiing in stiffer boots.
There are many older skiboot models to be had for quite cheap on eBay, StartHaus.com (their closeout deals), Proctor Jones. Cupolo's (cupolosports.com) has a terrible choice, few sizes, but great prices and a 25% off, free shipping deal. On the other hand, look at the thread about buying boots online.
Also look at the Jeff Bergeron bootfitting thread so that you get a flavor of what boots are we talking about, he can give you some great advice if you write a question.