From what i can gather and i maybe be wrong, but most 2011 cpu's will struggle with ram past 2500MHz so i would recomend no more than 2400 as you could well be wasting your money. Maybe worth posting in ask 8pack section as his knowledge on memory is impecable.
And certainly running 32gb is gonna make it even harder to achieve those speeds. I'm currently running some 2133 gskill ripjawsZ clocked at 2400 with fairly tight timings and i'd suggest those, again can clock upto 2500 depending on your cpu's imc, and if they dont you can certainly run them tight. Hope this helps.