you may want to check out the threads on badger and blade, as bay rum is mostly used as an aftershave.
a few to try:
dominica: inexpensive, short-lived, a reference bay rum.
st john's: a more complex blend, longer-lasting.
meehan bonny doon: very good stuff, but burns too much to apply after shaving imo.
captain's choice aftershave: this includes glycerine and witch hazel, so it functions as a soothing aftershave. the fragrance is more cinnamon than clove/bay.
c&s cuba aftershave: a much more complex composition, though definitely in the bay rum vein. longer lasting, very nice.