In the past 26 years, I've owned just about evey guitar, and every trem system. Alot of them were Charvels, with Kahler trem systems. I personally like them. There are naysyers, that will blindly spew out "Screw Kahlers! Get a Floyd!". Don't listen to them. You've played one, and apparently liked it. A properly maintained Kahler will stay in tune, wonderfully.
That said, I love Floyds, as well. However, most trem'd guitars I've owned that have had tuning issues have been floyd guitars. My two Kramers were the worst. If you go Floyd, stick with an OFR, or even an Ibanez Edge (IMHO, the best trem system, ever.).
With Floyds, you may have issues with blade edges. With Kahlers, you may have stuck rollers. Each have plenty of pull-up, provided the Floyd is routed. No warbles possible, and the Kahlers. And, actually, Kahlers seem to be making a comeback, currently. Each has their quirks.