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As far as cooling goes, a brand new stock C-14 OTA from Celestron made today has the cooling vents on the back same as the EdgeHD 14 does. So you don't have to purchase an EdgeHD OTA to get them. Deep Space Products sells replacement vents that have little 12VDC fans in them. They also sell a larger fan that fits into the removable secondary holder.
I owned a C-14 OTA years ago and currently own an EdgeHD 14 OTA which I keep on a Paramount ME. Unfortunately I have never owned a Meade 14 or 14 ACF, so I can't comment on them. I did own a Meade 10 in the '90s and it was a POS (both optically and mechanically).
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