Another vote for either Kai or Gingher!
I love my big heavy chrome shiny Ginghers, they cut through a quilt sandwich like butter when I'm squaring up and for me there's also a sentimental aspect - they make me think of my grandmother's scissors and all the hours we spent cutting wool squares for her quilts when I was a kid. Mine were a bit stiff when I got them but they've "relaxed" with use and right now they're perfect for me.
I just recently got a pair of Kai serrated scissors (due to recommendations on this board!) and they're much lighter and the serrations keeps fabric from slipping, which is handy if you just need to do a quick snip and keep it nice and straight. I haven't tried cutting through a ton of layers with mine yet though so not sure how well they'll do cutting through a quilt sandwich. They seem like really nice scissors though - very comfortable in my hand and the movement of the blades is nice right from the start - tight but not too tight.
I don't have any arthritis (yet) so I like the heavy and substantial feel of the Ginghers but if your hands are starting to wear out or if you tend to do a LOT of cutting in one sitting, Kai is probably the better choice simply because they're so much lighter. Due to the serrations on the Kai blade, I don't think they can be sharpened though. My Ginghers...I imagine I will own these scissors the rest of my life since I know they can be sharpened...although after a year of pretty heavy use they're still super sharp so I think there's a good chance that I will wear out before they will!
I bought my Ginghers for half-off at Joann's with a coupon; I bought my Kai scissors from Amazon. I would replace both if they went missing; I am a big fan of having choices!
Edit to add - I don't like Fiskars fabric scissors, except for their little "snip" size scissors. I've worn out two pair of 8-inch Fiskars in less than a year - they have been retired to "household scissor" status and live in the kitchen drawer now.