Replying to Looking to buy new Rossis

I've been skiing a pair of Rossignol scratches for the last 4 years and now I'm looking for a pair of skis that handle in powder a bit better. I've been reading some good reviews of the S5 but most of the reviewers were 6 foot and 170 + lbs, I'm 5'' and 140 lbs on a heavy day. I'm not really into super bendy skis (ie. anthems) but I don't want anything stiffer than my scratches.
Do you think the s5 178's would be too much of a ski for me?
P.S. I'm not really interested in other brands, I've been on Rossis since I was 5, but if you think there is another Rossi ski that would fit me better let me know.
Thanks,
Kyle