For the backdoor ROTH, I think the reference is to putting in 6 or 7K into a ROTH IRA by first putting it into a normal IRA and then converting (conversion has no income limits versus adding to a ROTH IRA does). And the problem is that having an existing rollover IRA makes it part of the conversion. Been doing it every year but then I never rolled over my 401k into an IRA. If I do roll over my 401k, it probably would not be possible for me to do the backdoor Roth IRA each year.
But I think this is off topic because conversion to a rollover IRA already happened so the question is really how to invest it given that with an IRA you have full control over it.
