The problem you may face is that the RX-8 at the 165cm and 170cm lengths are the most popular sizes for most adult skiers and the RX-8 has proven to be a very popular ski for Fischer. At 175cm, the ski may feel too long unless you are pretty burly.
You may want to check out some ski shops that carry Fischer in those areas of the country that didn't get much snow last season, like the PNW, Idaho or Montana. You may also want to check out http://www.shaversports.ca/
in Canada and www.gords.com
also in Canada. When you convert canadian currency to USD you may get a pretty good deal.
The RX-8 remains unchanged for the upcoming season so pre-season ski shop sales might also be an option.
Good luck. Half the fun is in the hunt.