Bob and all who replied,

I decided to try a J-tech standard Pitts muffler. krypton wanted to sell his, so it was good timing, and saved me a few bucks. Thanks krypton. I am still going to find a canister plan I like and build one for the DL 50. For the first time build, I would like to build from a design that works on the DL 50. For now I just need a reliable engine muffler combination that will let me concentrate on my flying, and not worrying about my muffler engine combination. Noise isn't a problem at our field.

From what I have read in this thread and others, it seems as if the J-tech may be a little quieter than most of the other Pitts mufflers with less power loss than most. About the only drawback noted was the physical appearance of the muffler.

The TBM mufflers are all over the place on noise and power loss. It seems like no one has really verified an increase in power. A couple said the db didn't seem to be reduced.

It sounds like Slimline makes a quality product, but may be a bit heavier and more restrictive.

Bisson seems to be good quality for the money. Not sure about power loss or db reduction, on this one.

If anyone had a favorite canister design bookmarked, just PM me with it, it is off topic forthis thread.

Greg