There is no reason to invest in stocks. As to bonds you should diversify.
You could go with
www.PIMCO.com the biggest bond familly. They actively manage their funds and charge a bit extra. Talk to a rep but I think you should chose their total return funds.
www.Vanguard.com is also good as they have low expense index funds and the company is owned by it's customers. Talk to a sales rep but I would chose both treasuries, GNMAs and inflation protected protected.
It might be worth talking to reps from both companies and putting 50k in each.
I myself own closed end funds like GIM FAX FCO to diversify away from the US$.