I'm about to buy 64gigs of ram for my 4,1 pro (flashed to 5,1). I realize that for the moment, I don't need anything faster than 1067mhz ram. Firstly, If I buy all the same brand in 1333mhz trim, future-proofing myself for an update, will it simply 'clock down' and work with my current 2.26ghz chips? Secondly, are these machines super-picky with "ram timings" etc, or will most off-the-shelf 1333 chips from my local canada-computers store do the trick? I've never had a problem with fast PC's and kingston/corsair/mushkin - or heck- even "a-data" brand ram. Opinions welcome. I just look at the prices for ram on macsales.com for the latest desktop machines and shake my head.