Being in the 28% bracket, I would max out any available pretax savings, then save more in Roth's, as $17,500/$35,000 a year isn't likely to get you to RE.
I was thinking we'd have to 72t, but now consider the Roth conversion path that borrom details as our likely route.
Due to our projected retirement at age 47, we aren't comfortable locking in 72t for 13 years.
If we run out of Roth, before 59.5 then we'll reevaluate starting a 72t.
Awaiting cash out of Corp retirement plan, saving, saving and saving more, in hopes of RE in 2016 at age 47.