At your young age, go aggressive on 100% stocks. You do have 4 kids, so in 5-6 years you may want to look into blended funds. Look at Vanguard's Wellington and Wellesley funds.
I've always been conservative in regards to money, but most people, yourself included, said I should definitely be more aggressive towards my retirement at my age.
26% in income going to retirement is OT baller status. Congrats.
We'll, to be fair, I'm only contributing 17%, my company puts the other 9%, but I am fully vested. I'm continually amazed at how many people where I work don't take advantage of the $ for $ 9% match my company gives.
I also recently opened a Roth IRA through TD Ameritrade. As of right now, I plan to contribute around $2000/ year, but will increase that amount each year.
My very optimistic goal is to retire at 52(about 20 years), but I'd be happy with 55
. Although, with 4 kids, I fully expect to be working into my 60s