M4 is faster than Agility III - Have Both. Pair of M4's in laptop and a pait of Agillity IIIs in I5-2500k Desktop. Pulled the OS + program agility IIIs and replaced it with a Samsung 830. As Realbeast stated, in real life not a big difference - But my VOTE goes to the M4. Ps Newegg I think has a sale on the Samsung 128 gig 830 - Approx $185 w/promo code EMCNHJN24.

Do NOT use Sequencial read/write performance as very misleading and does not translate well into performance for OS + program SSD.

For what it's worth my M4 and Samsung 830 both beat my agillity III by approx 60% (in overall AS SSD Score). Samsung 830 billed as most reliable of the three, Agility III wins the title of - You quessed it - the most probmatic.
 

diddle283

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thanks, Im from UK so can't buy from Newegg. I'm going to stick with my original choice and get the M4 I think. I checked out the Samsung 830, but it costs even more than the M4 and I was looking at saving money!

thanks for your help guys
 

diddle283

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thank you again! I have placed my order and did go with the M4, just need to get the windows 7 issue sorted now and I'm good to go!