I too used to have a DIR-655 (toasted mine) , changed it recently for an ASUS RT-N16.
Consider this an endorsement for the ASUS, they have done some great work on the firmware side, ASUS really seems to have upped its firmware game recently.
Personal computing discussed
It looks as if DDR3-1600 (PC3-12800) is not significantly more expensive than DDR3-1333 (PC3-10600). I'd get the faster memory.