I am fine with 4 yrs or 6 yrs with 2 yr limits, house and Senate respectively.
I'd be ok with three 4 years terms for Reps, voting happening every off 2 year cycle from the prez. (so 2014 - 2018 - 2022 etc)
I's fine with the senate being 6 years, ans split up in roughly 3rds for each election every 2 years, the just need to be limited to 2 terms
Prez at two 4 year terms is fine by me, just get rid of the electoral college crap, it's useless and has run it's course. Just have it be national popular vote.