Some of these fancy self cleaning litter trays are far more trouble than they are worth. A breeder friend bought one of the littermaids and she said it was a nightmare to clean - especially if the cats had a runny bum! She sent it back.
I would stick to a normal tray - there are so many different types available,
products new home - Booda Cleanstep Litter Tray
These are pretty cool or
Litter Trayz & Essentials : Pinky Pawz - Simply ... the cats whiskers!, Pinky Pawz - Simply ... the cats whiskers!
If you do a search there are just dozens of different kinds.
As you are planning on perhaps a Siberian and Ragdoll I would go for a large tray.
If you give me an idea of where you are in the country I could perhaps recommend some reputable registered Ragdoll breeders to you. Just PM me
