After 30 years of assembling coax cables for antennas and jumpers in the shack, I have some strong preferences.
1. If standard Belden brand name coax (RG-8/U; RG-213/U ; RG-8X) is correct for my application, I buy it. Consistent quality and I have never been surprised. Some specific exceptions (e.g. The Wireman's Certified Quality #117, Heliax, Times LMR, and a couple of others)
From the 1970's CB junk to no name suppliers of the 21st century ... junk continues to sell (e.g. breaks in shield, inconsitent shielding, poor jacket formulations, incorrect center condutor diameter)
2. Good connectors, real teflon - and not white plastic (match test solves this) or quality Amphenol phenolic.
3. When on occasion I need a quick shipment in the field, I have had "Press" (@ Wireman) install the connectors for a modest fee. Quick field shipments, while rare, save project delays.http://www.thewireman.com/index.shtml