I've been shooting my Perazzi MX8 with 32" barrels for many years, but purchased a Blaser F3 wih 32" barrels and Teague chokes from Litt's in the U.K. as a backup gun a year ago.
1 - I really do like the F3 even though the stock is not a custom fit, just the lowest dimension they offer and just under 15" L.O.P.
2 - Blaser has been promoting the fact that ALL their barrels weigh the same whether 28", 30", 32" or 34" due to the precise contour they employ in manufacturing. So unlike a lot of other guns where a 32" barrel (like a Browning) may be very muzzle heavy weight forword compared to the same gun fitted with 30" barrels, the Blaser doesn't have that problem.
3 - The 32" barrels on my F3 actually weigh a few ounces less than my Perazzi 32's, but the difference is feel and quickness is that the Blaser feels much faster and lighter.
Although both the Perazzi and Blaser that I have weigh almost the same (with in 2 ounces), the Blaser feels a pound lighter.
The Perazzi has had a custom trigger job (Giacomo) that makes it crisp and clean. The Blaser mechanical triggers are excellent right out of the box!
Highly recommend the Blaser and I wouldn't be at all afraid of the 34" barrels as I might on another make of gun, especially since you have a rather long L.O.P at 15.5".
It will probably weigh around 8 1/2 lbs. or a bit less...so it will be a different feel than your K-80, but it will have great balance and move like a dream from a low gun mount, points well like a Perazzi and has the bells and whistles you'll like for a sporting clays gun. Just my opinion of course, but I like it.
