I use the $16 set with 1/2" tubing on my system and I have no complaints. I don't know who is using 1" lines. That's huge. Maybe 3/4" but unnecessary I think unless you are in the 1 BBL or bigger range. You could use the threaded quick disconnects instead of the barbed to attach your hoses, I believe the threaded ones have a larger ID so you have less restriction. Again, I use the barbed ones with no complaints. Could my recirculation speeds be a little faster with less restriction, sure, but I have yet to see the need for more flow than what I have. If you are worried about flow, go with camlocks from brewhardware.com. He has special custom ones that use a 1/2" ID to match the tubing.