I have the SD-2 (i'm pretty sure that's the model) plugs from Fram. They screw in and have a valve in them. there's a cap that screws over plug itself. for oil changes, you remove the cap and they come with a little nozzle that screws onto the plug and relases the valve thus draining the oil.. (no mess) They're $12ea or so..but you won't ever have to worry about stripping the pan because you never have to actually unscrew the plug. if you've already stripped your pan though, you may end up needing a new pan. I don't know if there's a way to fix a stripped pan hole.
I find mine to be very worthwhile...i can drain the oil w/o even having to lift the car. just reach under their and it can all be done by hand. not tools, and I've never had a problem. had them over a year. My .02.
Eric