Recently (past couple of weeks), I've been extensively reading these forums in particular. I've learned a lot, but I really have a few hurdles I need to overcome to be able to go "all-in"

With my current portfolio (wife included) our current assest class allocation is:
Cash - 17.5% (Mostly taxable savings accounts)
Bonds - 3.5% (FAGIX below in 401k currently)
PRPFX - 12.5% (some taxable, some Roth)
Stock - 66.5% (401Ks make up 60%, ~6% in Roth/Taxable)
My current taxable / tax-deffered / tax-free allocations are:
Wife 401k - 35%
My 401k(1) - 25%
My 401k(2) - 3%
Wife Roth - 5%
My Roth - 7%
Taxable - 25%
I had a lot more "cash" when I added it all up in a spreadsheet than I thought I did. I figured I was pretty much all in on stocks as I considered my 401k as my retirement accounts and the rest was more emergency fund. With the PP you can consider it all part of your portfolio.
What I can't get past is the percentage locked up in 401k's. I can roll over my larger 401k (25%) to an IRA, so that will give me the flexibility to purchase LT Bonds in a tax advantaged account (this does give rise to my 2nd hurdle, but I'll leave that for another post).
My Wife's 401k is with her current employer and they do not offer a brokerage window. The stock funds are actually excellent, with S&P500 Index (Spartan w/ 0.10) and a load of other Spartan indexs with low fees. My current thinking would be to use her 401k for the stock and cash positions as these are the only two available assest classes. I just need a little help in picking which Bond or Stable Value fund would be the most appropriate.
The Stable Value MIP seems like the best as a true representation of cash, but it has a 0.55 expense ratio and only 1.2% expected return. As I was pretty much all-in on stock index funds, I am definitely fine with taking some risk and am leaning toward the FGOVX or VBTSX. I already hold a position (3.3% overall) in FAGIX but I think that's a little too much like stock to be considered cash.
I just don't want to undermine the principles of the HB PP in the process. What do you think would be ok to hold for the cash component?
Stable Value - No ticker, below was the best I could find
"MIP" FID Managed Income Portfolio (0.55)
http://www.surs.com/pdfs/SMP/funds/F-MaInPo.pdf
http://www.drivetimebenefits.com/media/ ... 004-10.pdf
Bonds
VBTSX Vanguard Total Bond Market Index Fund Signal Shares (0.11)
FAGIX Fidelity Capital & Income Fund (0.76)
PTTRX PIMCO Total Return Inst CL (0.47)
FGOVX Fidelity Government Income Fund (0.45)