Also, [tag=249322]@Cade2[/tag] , he's asking an opinion on two Line skis, not Vishnus. Also, if you like your various K2 skis, not to mention your Bacons, I've got some bad news for you...
OP, I've ridden the 2020 Line Blend for a season (strictly park) and they were a lot of fun. You could probably find something slightly used or an older model for cheap than 600$ (a little steep for a soft park ski in my opinion). As long as you take care of them, any ski can last you a long time. Wax regularly, and watch your edges like a hawk for edge cracks from rails.
People rip on Line for having a "good" warranty program. From my experience as a shop employee, they warranty factory defects, not user induced damage. However no company will warranty damage like this (except for Faction, which replace skis that are literally in 2 pieces). I'd personally stay away from the Badger because of the material that they use vs. the Blend. The Badger is geared towards lighter guys/tweener skiers. The Blend is a lot more durable from experience and the price reflects that.
All in all, go with the blend, they're stiffer underfoot (at least the 2020 version was), they're going to be more durable in the long run (provided you take care of them like a baby like all skis deserve) and a better length at 171. They have a bit of rocker and they're (obviously) twin, so they will ski short. Not sure if you're still growing but if you are, you can grow into them quite nicely. Also, don't be afraid of stiffer skis and their buttering capabilities, unless they're as stiff as a 2x4 you should be fine.
**This post was edited on Nov 1st 2020 at 8:04:34pm