Vanguard Prime Money Market (VMMXX) or Ally Savings account. My money will be in VMMXX just because I already had a Vanguard account open. Should get you ~2.2%

Vanguard Prime Money Market (VMMXX) or Ally Savings account. My money will be in VMMXX just because I already had a Vanguard account open. Should get you ~2.2% return and getting your money out is relatively easy. IIRC you can even write checks against the account.