401K Plan. Should I transfer to new employer 401K or personal IRA?

Can I choose Traditional or Roth? Will I be taxed upon rollover to Roth.

My former employer Used Fidelity Investments. Would it make sense for me to contact Fidelity to get my personal IRA, maybe save fees if same brokerage?

You don't want to transfer your 401(k) into another 401(k). You want to roll it over into an IRA. For now, the IRS only allows you to rollover a 401(k) into a Traditional IRA. Then 12 months later, you can roll it over into a Roth IRA. (sounds stupid right? Well, in 2010, anyone can open or rollover assets into a Roth IRA). When you convert a Traditional IRA into a Roth IRA, you will be taxed on the gains, not on your non-deductible contributions.

It would make sense to open an IRA at Fidelity. That way you don't have to worry about whether the investments in your 401(k) is offered at Fidelity. If some of the investments in your 401(k) is not offered at Fidelity, then you would need to sell them and purchase investments that are offered at Fidelity.

yes, do transfer it (don't cash it in). Ask about the Roth. Ask an accountant or a CPA about the taxes.

I would transfer it to a Fidelity IRA--that way you'll have flexibility with at least that portion of your retirement accounts to invest how you choose. You can only rollover 401ks to Traditional IRAs, but you can then convert it to a Roth IRA if you want to. If you do that you will owe income taxes on the balance, but I think a Roth is the better way to go, all things equal.

I recommend sticking with Fidelity not only because you might save money in the transfer (by not paying front end loads on new funds) but because they are a very well-reputed company with a variety of low cost, high performing funds.

If your new employer matches what you put in then go ahead and transfer it to the new employer if not get an IRA or an Annuity

Rollover IRA gives you more control, but you'd have to actively manage it. With new employer 401K you are limited in where you can invest your money, but, if needed, you can get some service and advice from a company that manages it.

You could leave you 401(k) where it is if you like the investment options...or transfer it out (no tax consequences) to a perosnal IRA with the brokerage of your choice...

Yes, if you rollover to a Roth you will pay all due taxes... A Roth is funded with "after-tax" dollars...

Fidelity are a fine choice for an IRA, and they certainly aren't going away anywhere!