Looking for high quality wire and connector brands.

Earlier this year, a friend and I started our own side business where we mainly rewire classic cars. When I started wiring; the cars I was doing were just basic drivers with almost no accessories and I could use what came in the wiring harness box and nothing extra. However, I am now working on cars that need four plus relays and have power everything and most of them want fuel injection as well as modern engines. Now I am modifying the harnesses to accommodate all this extra stuff and the wire company I am using now does not have the best selection. And I am getting tired of running to the parts store to buy connectors every other week.

Now we are using Beeflex - BeeFlex.com and just O'Reilly connectors.

Thank you for any input or opinions as I am only just getting heavy into electrical and I really appreciate the insight