I generally agree with what SusanY1 said. However, it should be easy to find investments for a Roth IRA that have the same or lower expenses than the investments in the 403(b). Since some of a $200k Roth conversion would be taxed in the 32% tax bracket, I would not convert all in one year. Also be aware that an increase in AGI could have side effects such as NIIT that increase tax liability. Finally, consider state taxes since that some states have pension exclusions that are likely not available before age 65.
