1) The 128 gig seems to be the sweet spot for a OS + program drive. However both the M4 and the 830 256 gig drives have Often been on sale for $180 which makes them very tempting and allows more space if planning on sticking a number of Games in addition to standard programs.
2) My recommendation still stands - Curcial M4 or Samsung 830 (altho Plextor has a P3 that aught to be OK.
Performance wise - There is VERY little diff in day-to-day operating performance. Most differences are in the syntictic Benchmarks which often do NOT translate to real performance gains. Not a Lover of SF22xx based controllers - have great bench marks for Sequncial read/write when Using data that is readily compressable - BOTH are NOT very important. Sequencial performance (the Most advertised) is the LEAST important. Real data, while it does compress somewhat, it IS not Highly compressable.
You will NOT see much difference (outside of benchmarks) for the M4 or the 830.
So; Of these two Buy the Cheapest one. If same price, I recommend the m4 for laptops, lower power consumption - easier on battery, and the 830 for desktop. Note For OS + program random 4 K reads are the most important parameter.
Yes OCZ has finally ironed out Most of the problems, But still do not recommend. The nwer -4 Versions may be OK, But have NOT been out long enought for my stamp of approval, and then I'm not a lover of the Company.
Have:
3 Ea M4s, 2 128 gig models and one 256 gig M4
3 Ea 830s, 2 128 gig models and one 256 gig 830
(Bought both 256 gig SSDs at 180 bucks from newegg)
2 Ea Agillity IIIs (Ugh)