Recommdations for bond funds? No, sorry. I have bonds themselves in my 401(k). You might want to talk to someone at Bill Gross's company, PIMCO. He's the wiz when it comes to bonds.
The downside risk to bonds is that interest rates will get raised, rendering your fixed rate bonds less desirable and causing their value to fall.
In the current environment, that doesn't seem too likely. It is a goal of Keynesian economists to lower interest rates to near zero and keep them there. After 70 years, it looks like they've finally gotten their way. It's to the detriment of savers like me, of course, which is why I've seen the light and am actively working to spend my dollars on things that will hold their value better than these garbage Federal Reserve Notes.

Gold is $1,581/oz today. When it hits $2,000, it will be up 26.5%. Let's see how long that takes. - De 3/11/2013 - ANSWER: 7 Years, 5 Months