I'm considering getting a new 27" quad-core iMac, quad-core mac pro, or eight-core Mac Pro to use for editing AVCHD footage off of a Canon HG10, HG20, and a GoPro vehicle mounted camera. The editing I do isn't exactly major motion picture graphics work that requires rendering banks of computers hooked together, but I would like to accelerate rendering times. I currently run a 2.4GHz MacBook Pro with 4Gb RAM (its from about 3 years ago) and it made a DVD in about 2 weeks working with nearly 2TB's of hard drives full of raw footage. Since the MBP i have now is a dual-core processor (intel based of course) I know any more cores will really improve rendering/processing times, but I want to know what your opinions are. Is it a better idea to get 8GB of RAM or 16GB in either 3 of the Mac's I'm considering, basically will that doubling in RAM improve the processing speed of the AVCHD footage from either of the HD Canon camcorders substantially enough to justify the extra cost... even from a site like macsales.com where its generally less expensive than OEM upgrades. Thanks in advance to everyone who puts some thought to this.