How you choose a development tool for your a 8051 device? Assume that you've got one of the simpler ones without any fancy add-ons like CAN or USB. The big players seem to be Keil, Raisonance, IAR systems, and Crossware (pretty much in that order) -- these guys seem to have their own IDE and all the tools to go with (assembler, compiler, debugger, in-system debugger) without linking to 3rd parties for help. How do you choose from them?