How about this...you'll never see a car win a finals either MECA or IASCA using cdt....
I have to say that I'm not a big fan of a lot of judges out there. What they're looking for, and what I like are very often two very different things. I don't change my preferences for anything due to somebody else's opinion on what something should be. If I like my tweeters a little more laid back, but I won't win a comp because of it, well then, screw the competition. If I like more red in my video, then screw what the salesperson says it should look like.
So, I don't like that argument. It also tells me that a lot of judges are brand loyal, and let's face it, they are. If the judge feels Utopias are the greatest sounding speakers ever, and you show up with a set of DLS Iridiums, which sound completely different, you're going to have a hard time scoring points over the guy in the next lane sporting his shiny set of Focals.
Now on to your point about saving for something of quality as opposed to settling on something cheaper, just to have to buy something again later is a VERY valid point. On this I will agree 110%.
I'm not a CDT fanboi, but they have their place, and to completely rule them out is purely based on preference and nothing else. You can't state anything as fact when it comes to SQ. I can make a set of Pyle components sound decent, and probably great to an untrained ear. So, it is all subjective.
CDT is very laid back, and that doesn't bode well for competitions where screaming highs are the norm. It does bode well for long road trips where you don't want your ears bleeding after 1/2 an hour.