The first Power Play System Q irons, without the weights -- wide, heavy sole, low profile -- so easy to hit
Power Play Warp Speed -- I liked them more than the Prophet CB -- maybe the only one who did
Sun Valley Golf has some clones that they make in 304 stainless, so they're easier to bend. Quality was good -- had some Burner II clones several years back in the black finish -- the soles are worn but the edges of the faces still look pretty good.
I've liked the DTG clones I've had, along with their Felon irons, which despite the name, were conforming. They had strong lofts, shallower grooves, but still hit the ball way up in the air and landed soft.