I haven't heard anything about them being heavy although the flexiness might be an issue. They are known as one of the softest skis on the market. You could just buy a big size, which would help stiffen them a bit, or buy anthems, with are 92 underfoot. You say you want something soft, yet not too soft...
You could also look into fujatives and even though I'm not sure if they make them anymore, you can buy older ones. They're pretty durable and, as far as I know, stiffer than the invaders.
"I kinda felt like a dork just now...I was taking a dump butt naked except for my socks, goggles, and a condom beanie while talking to you and trying to open a bag of peanuts": thefilmerguy, on the phone with me
Check this out and tell me what you think!: