Performance diference between the higher end SATAT III SSDs is not that big of an issue.
Benchmarks are just that, and in the case of SSDs can be missleading.
1) Most manuf published benchmarks are with ATTO. ATTO uses data that is readily compressable - NOT real world. If Need to look at benchmark differences look for PCMark Vantage (overall score and score for the apps you most use), 2nd best is AS SSD whitch uses compressed data (closer to real world).
2) Most manuf stress Sequencial read/write speeds - Bah HUM BUG. This is the least important parameter for an OS + Program drive. It is the small file random 4k read/writes that are most important.
3) select drive Based on Least user problems. I Know you are not going to buy from newegg (USA) but at least look at user comments when deciding on which drive to buy (Only look at one with 30 or more responses). will post more on this.
My normal recomendations are Intel, Curcial M4 and Samsung 830. Which of these three - which ever is cheapest.
On 120/128 gig SSD. That is the recommended size, also the most popular. My win 7 installations are all around 30 -> 40 Gigs. Add to that the typical size of the games you want to play. Also when looking at the size Substract about 18% to get your usable size. Reason you lose aboyt 7% due to the way manuf count - they use base 10, computers use base 2. Then you must always maintain a minium of 10 % of the drive Free so that Trim and CG can work their magic.
OK Back, fromone of my earlier post: Again I know you will not buy from them, but it is a good source for info sometimes.
Instead look at "user satisfaction" numbers ie at Newegg.
mushkin enhanced chronos - 16%, 1/2 egg and 80% 4/5 egg
Samsung - ........................ 4% 1/2 egg and 94 % 4/5 egg
Curcial M4 - ...................... 5% 1/2 egg and 90% 4/5 egg
Vertex 3 - ........................ 30% 1/2 eggs vs 68% 4/5 eggs
Ref:
Mushkins
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226236&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-RSSDailyDeals-_-na-_-na&AID=10521304&PID=4176827&SID=1sq38npfyjcyu
Samsung 830
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147137&SortField=0&SummaryType=0&PageSize=10&SelectedRating=-1&VideoOnlyMark=False&IsFeedbackTab=true#scrollFullInfo
Curcial M4 -
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148448&SortField=0&SummaryType=0&PageSize=10&SelectedRating=-1&VideoOnlyMark=False&IsFeedbackTab=true#scrollFullInfo
Vertex 3 -
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227706
About Agility III - I Have 2 120 agility III. They are cheap for a reason. They preform no better on a SATA III port than when on a SATA II port. Ref: a review which I verified on my 120 Gig Agility III on an i5-2500k system. Using AS SSD they score around the mid 400's My Curcial M4 and my Samsung 830 both score in the 700's (Note score refers to overall score).
I have 2 128 gig M4s, 1 128 gig Samsung 830, 2 128 gig Agility IIIs, Intel G1 & a G2, Phoenix pro, a Torqx, and a WD SSD.
NONE have died YET and the only one that I had a problem with was the Agillity III - OCZ only took about 8 Months to sort out their problem.