[trainedmonkey]

My suggestion would be an account at Fidelity or Schwab. There you could buy funds from multiple funds families in a single account. In their brokerage style accounts you can hold a subaccount for a Rollover IRA, Roth IRA and Individual account.

Each of these accounts can hold stocks, bonds, money market mutual funds and regular mutual funds. You would want to review the cost of holding this type account and weigh it against the convienence. You would also want to review the mutual funds available through their fund networks to determine if you can hold your favorites without transaction fees.

I would think you can transfer into these types of accounts without leaving the market (in kind transfer) and as a result not incur any tax liability but you would want to consult with your financial adviser, tax adviser or the brokerage companies themselves.

I think Fidelity waves most of their fees if you wave getting paper, which I love and most accounts, I think, wave fees for accounts over a combined total of 100,000.

Of course, as always, its a good idea if you're dealing with large sums of money to consult a professional upon making any major financial decisions.
You should review all aspects of a decision based on your comfort level and knowledge of how the decision will impact your personal situation.