There's 8X and there's 8X. I have acquired several hundred feet of 8X very cheap via the Internet, and I have not yet found what's wrong with it. I mainly use it for Field Day, and a 200 foot run of it worked great on the HF bands last June. It came with connectors on it, so I haven't seen if the braid coverage is decent or not yet. Now, RG-58 is something else, entirely. I regard most 58 as junk. Decent 8X at least has a stranded center conductor, making it more flexible. I use 8X in lots of places - mobile and portable installations, going around rotators on HF beams, and jumpers in the shack, though I've started to make more of those from double-shielded cables. When assembling your own connectors, be sure you have the correct adapters for RG-8X. It's not the same size as the one used for RG-58.