What's your budget? Repeating launchers are nice, but expensive and don't toss birds as well as wingers. Box Launchers are also nice.
Wingers are my preference, but you must walk out and reload after each run.
My suggestion is to buy some of each if the budget allows.
There is a thread about the Gunners up winger going on and IMHO it is a good product at a great price. Also there are threads on Bumper Boy launchers as well (we've used them without much problem and had good service).
I've used Strongarms, Bumper Boys, Shur Flytes, Gunners Up, Tripods, Zingers and seen some of Jerry Day/Roellchen's stuff and all are good stuff. Some are more economical than others, but all toss birds and the dogs don't complain most of the time
PS (just between you and me LMAO)...rumor has it that Gunners up will have a box launcher available soon.