Hi,
Just to quickly answer your questions below, but I trust a lot will follow, since it is a fairly wide topic.
First a question of myself, you will be using SAP Console as web (more user friendly layout) or a telnet (which is more text based)?
No real suprises, but just be aware that not everything in SAP is supported in RF. Even stupid things that make sense to have on RF like a simple bin to bin movement do not exist in standard SAP, and have to be developed.
Personally I've always been using Psion Teklogix as a brand, they are good in service and easy in setup. Try to buy them with the Naurtech browser if you going for the webbased version. Can't really give you any types, since it depends if you go for handhelds (workabout pro would be nice) which are 16x20 screen size. Or if you also need terminals for forklifts (screen is 8x40).
Cycle counting is supported. On creation of the inventory documents, you can input the userID of the person responsible for the count of that document(s). This user will then (assuming you use system guided cycle count) get all bins automatically on his screen and needs to count them. Also if he finds a material in a bin that is not there according to SAP, he can manually add this on the RF gun.
I'm going to ask a stupid question now, but I assume you are WM managed right

?
Look into the mobile data entry in your customizing, there is specific setup you can do to make your management of your warehouse employees a bit easier etc...
Let me know if you need more.
REgards