I use a Biondo Mega 450 box and love the way it works. Whatever you get make sure it will do multiple things, such as operating the stop, shifter and an SLR. As for shifters, lots of options. I personally have a Pistol Grip Quarter Stick in mine with a Dedenbear air shifter. Never any issues with it. PPP is IMO the best piece out there, but just dont see the need for me. I use a Big Bore Dedenbear air stop with 4 blades. My car spends a LOT of time(4.8-5.0)on the stop to run S/ST. Many folks like the #1 stops and you will find a lot of them on the "hitters" cars. Also the new stop being built by Sunset looks nice.

Good luck with making your decisions and with running S/ST. We have a blast running S/ST I really like the challenge of keeping the car on the number. Great group of guys as well.