Good/Bad Experiences when changing to 3/8" fuel line & sending unit?

Q:What has your experience been with the New 3/8" fuel sending units available these days?

I've found only one (so far) made in No. America,(from Bouchillon Performance)....all others seem to be made in Taiwan or China. Not liking the idea of putting in something made over seas.

Q: Any good experiences with some made in Canada/USA that I haven't found yet?

The guy that is going to help me with my upgrade is suggesting I change my fuel line and sending unit to 3/8".

I have a fairly mild 340, and didn't think I need/want the 3/8" line/sending unit, but he said he pulls the sending unit any time he welds on a car, so it's coming out anyway.

ALSO...I asked about if I should buy one with a 1/4" return line. He told me No, they only complicate the system.

Q: What is your experiences with a return line? Good/Bad?

Thank You for any help with this issue!
Dan