Can I do any better than BJC LC-1 or Gotham GAC-1 Ultra Pro for the money?

OP, measurements? I don't think so, not at least from a practical point of view. It's really about synergy between components and your speakers/ears. Lack of meaningful measurements is one of the reasons that that is so much discussion about cables in the first place. Don't get me wrong, there are measurements that are meaningful for someone who knows how to use them in the context of their system, but no one can really make really meaningful recommendations without experience with your stuff, in your room, and specific sonic preferences sound wise.

When asking about wires it is nice to have a point of reference otherwise the advise you get will be rather generic for you. BJ's is a good cheap cable, IC's or speaker, but does have a sonic signature. Its not razor sharp likes some others which are highly regarded (or condemned) by some folks. What I like to suggest is that you waste a few bucks to see just how much you can hear the difference between two cables/IC's and if you can hear the difference it might point you in the direction you should go with your whole system. You might get a 2 meter BJC L1  and a 2 meter WBC Mogami 2549 and listen to them. They are both good quality cheap cables but with a distinct sonic signature. If you can't hear the difference don't waste money on cables at this point in your audio trip. If you can hear a difference you can choose, or at least get recommendations for cables with a similar signature.

No, I don't agree. As previously indicated there are measurements available for cables, but cables/IC's, etc are meant to connect 2 components, and the sum of these three items would be the meaningful measurements to consider. Most folks I believe have neither the competence nor equipment necessary to make such measurements, nor the ability to assess how much of what they hear comes from other components or room set up. 

FWIW, when it comes to describing sonic differences, I'm not sure you will be able to get any uniformity of opinion about what constitutes high frequencies. There are primary tones and there are overtones. The frequency range for 'high frequencies' for the former can be up to say 2500 to 3500 hz (unless you are listening to a recorder or Ema Sumac) and overtones ranging from 3500 hz up to dog frequencies. When I think about what constitutes high frequencies I think of 'overtones' because that makes the spectrum more natural. But I know of folks who think high frequencies consist of the sound in the 2500 hertz range. In fact some equipment manufacturers have been know to juice up that range to give their components a greater sense of highs. 

So my original advise still stands. Take it and you will have a personal view of the type of sound you which to hear. Hopefully you will like one of the two and then be able to make your decision accordingly. 

Good luck.

Other than having to obtain sensitive test equipment and the experience to use it meaningfully, you have no other impediments to measuring roll off, or other artifacts, in cables. Personally, as you might have guessed, I prefer to use my ears. Cheaper for sure, and good enuf for me.

You win the argument, now what are you going to do? :-) Oh, yeh, as you might have also guessed I’m not very strong on the value of other folks opinions as they relate to my stuff and what I want to get out of it sound wise. I do a lot of ’listening" and judge for myself.