Razorback shock, seatstay upgrade question

[K2Convert]

I got my wife a 2001 razorback from ediscountbike a few weeks ago.  She really likes the bike and is much much faster now.  I have read that the newer Fox shock and carbon stays are or will be available soon.  With some of the negative talk with some Noleen products, I wanted to know how much this possible upgrade will cost?  Also, I noticed the stock shock is extremely progressive and ramps up quickly so the ride might be more harsh than it could be.  The new fox shock looks like it may be larger.  If it is, does that mean it will have more air volume and potentially be less progressive?  This is her first full-suspension frame and she's happy, I just wonder if she'd be that much more happy with the upgrade, thanks.

[kiwi]

ummm i remember someone posted about this very thing...maybe try a search on razorback or fox or both......