Yeah, I'd agree. In the long-run, especially when you start doing some filling out, the 171 would do a bit better for you in that ski.
If you would feel more comfortable in something short like a 161, you might be better off going with something a little bit stiffer, but still symmetrical like the Volkl Wall. You could also look at something like the K2 Extreme which is more of an all mountain twin in a 164.