My favorites are:
SRT61, or RT57
SRT372, or RT348
HEMI61, or HEMI57
MYHEMI
DODGE61, DODGE57
MOPAR61, or MOPAR57
(Note: In NJ you can personalize your plate for a one-time fee of $50, in addition to the regular registration fee. A personalized plate must have at least three letters and a maximum of seven characters in combination of letters and numbers).