Getting back to the OP's statement, "...I'm looking at GB, and all the magazines I can to see what is out there ......" brings us to the need to ALWAYS CONSIDER THE SOURCE.
Gun Broker and most gun magazines, exist to SELL things. So they may not be the best sources of knowledge and information.
I'm not going to disparage the 6.5 Creedmoor but I will say that the bandwagon for the 6.5 CM is big & loud.
The 6.5 CM fits right in between the 243 Win and the 7mm-08. And while the 6.5CM is based on the 30 TC case and not the 308 Win case like the other two cartridges, it really isn't anything more than the middle child of that family.
So, is the 243 Win. (a 6mm short action cartridge) going away because there's this new 6.5mm short action cartridge available - Probably NOT.
The gap between 243 Win and 308 Win is currently filled by the 7mm-08. Marketers are attempting to squeeze more sales out of that arena by heavily (and I mean really heavily) pushing the 6.5 CM. I can't predict the future but I can observe current marketing; the current marketing push for the 6.5CM is strong.
Will the 6.5 CM kill off the 243 Win.? , I doubt it.
Will the 6.5 CM kill off the 6.5 x 55 ? maybe in the U.S.