the 175 has a 48 gallon tank and rides very "Big" for a 17 ft boat. However, the 180 is a whole different class...It wuns very big for an 18 foot boat....Feels more like a 20......
I bought my son a used 175 (1993) last year and it's a tank......We did a little refitting over the winter and it came out great. My Brother in law bought a 1997 whaler (Outrage) last year about the same time....nice boat, but nowhere near as good as the GW. Slower, rougher, narrower......Still, a nice boat but the 175 blows it away....