*Disclaimer-I sell Ocean Rodeo, Cabrinha, etc...
If you're a guy that still owns/rides a Slingshot Key, I'm guessing that any other kite will seem amazing! I know that's not the one that you're replacing, but was definitely NOT one of the best kites ever made.
On a more serious note, I'd encourage you to try an Ocean Rodeo Flite 12m. Easily one of the most responsive, big jumpers out there. Bar pressure is light, hang time is very good. Also has turned out to be very good for foiling. They are easily pushed to the edge of the window when you start getting overpowered, so the range on them is excellent. Not only do I sell them, I spent MY dollars on a quiver of them (17/12/8).
Switchblades have been around long enough that most everyone is familiar with them. Without being the very best at anything, they are very good at just about everything. Build quality, longevity, performance, etc...all very good. They've just normally been expensive. For what it's worth, I have some closeout Switchblades left at 20% off in 11 and 12m.
One thing worth noting here: Ocean Rodeo reduced their prices by almost $200 this past year and Cabrinha has also just done it. Excellent news for all of us!