Header flange

So I'm getting close to putting the headers on and was wondering if y'all would use these reducers or if you would just go with the all welded exhaust. Summit SUM-G4771 - Summit® Header Buddies
These are the ones that are called "buddy collectors or flange" which ever term you prefer. I have used the old style three bold flange and gasket b4 and they seem to leak. I don't want that lovely exhaust leak sound. whats the best way to do this?

I like to use these on my exhaust,
Dynatech 60-912300S - Dynatech V-Clamp Kits

I have those on my truck and recommend them. The only reason why I went that route is because I had spent hours upon hours trying to get the band clamps and slip joints to come apart before.

Take the 3 bolt flanges to a GOOD exhaust shop who does some good welding. Make sure to have copper gaskets installed in between the flanges to eliminate exhaust leaks. *Just for the record, my exhaust (done with this setup) has never leaked at the flanges.*

When you go this route, make sure to use good hardened bolts and nuts. This will help when you need to remove the exhaust.