Replying to NEED info on 06/07 Scratches FS WRS - Please HELP!

I just received a good deal for a brand new pair of Rossi Scratch FS WRS for $379 (incl. tax and converted to US$) here in Europe.

I want to know how the Scratches compare to my current 04/05 PE's which I find great for all-mountain but a tad stiff, heavy and pretty dead for park and totally useless in easy powder.

So I want a poppier, lighter ski that can also handle all-mountain and some easy pow. (I have last years' SV's for bigger powder days)

I'm also not so sure about the length. I'm 5'10, 175 lbs.
I know that in 99.9% cases I would go for 181cm, but I find my PEs a bit long for learning spins and jumps, since I started park skiing last year. Plus the 174 seem too short?!

How do Rossi length's compare to K2 lengths? I know that all K2's measure exactly as stated (measured tip-to-tip)

I would greatly appreciate any input from you guys...and sorry for the length of the text.