I'm reasonably happy with the NoroDrive racks that I purchased from Mick's Garage, and the price is right: https://www.micksgarage.com/d/roof-r...lid-roof-rails
They are easy to put on and take off, they have a good mechanical design, they fit reasonably well, they have a higher load rating than some of the competition. Purchasing from Mick's Garage and shipping costs worked reasonably well (I had to wait about a week for them to arrive).
They could certainly carry two kayaks without problem, unless the kayaks are unusually wide abeam, in which case you might need to tip them or attach an accessory for kayaks to the cross bars.
The downside is that with nothing tied on, at speeds above about 40 MPH, you might think you're listening to a tuba tuning up in the orchestra. But there's an easy cure for that: wrap a bungee cord around the front rack three or four times and it goes almost totally silent with respect to wind noise.
There are other styles that are more fashionable, but I like the fact that the NoroDrive crossbar sticks past the support pillars because that makes it easier to securely tie on a load than you can do with the more fashionable racks that blend the support pillars into the crossbar with no overhang.
Hope it helps.