been doing some research, looks like i got my answer so hoping this benefits others.
G.Skill SNIPER Series 1600MHz CL9 8GB Review - Conclusion
this review is older, but it still is relevant imo.
here's an awesome review on the samsung 30nm
Samsung 30 nm Green PC3-12800 Low Profile 1.35 V DDR3 Review | techPowerUp
here's the qualified mobo list,but in my opinion it doesn't matter. couldn't find anything for the samsung - but again most ram is compatible with each other, it's a matter of what was tested for the manufacturer which ensures a spot on the qualifier list (unless your gskill who are go out of their to show their product, +1)
G.SKILL-Products
in sum:
samsung
-30nm are VERY low profile, no problems with aftermarket heatsinks
-AWESOME OC capacity
-low voltage even after OC. sweet deal when your getting performance that won't interfere with OC cpu, cause <1.5v.
-great price vs performance (good scaling)
-DON'T BE FOOLED BY LATENCY
gskill sniper
-good low volt, 1.25v if you do not OC and accept the latency. Acceptable performance, just throw them in there without any headaches (SET AND FORGET IT, lol)
-no room for OC, quickly go over 1.5v and there's much better RAM out there at >1.5v. bad scaling
hope that helps guys.
as for myself, i'm thinking whether i just want ram to throw in, or actually OC. haven't decided yet. i am going to OC the cpu (i5-2500k), so we'll see if i am feeling lazy or not lol.
what would you do? give me your inputs, don't be shy!! :)