Should I eliminate my sub-woofer?  

Hard to say for sure, but leaving the sub in should allow you to maintain higher SPL in the bass range. You could just crossover at about 60Hz. That way, your new towers will get some work below the level your current bookshelves go, but yet won't be responsible for the entire range, allowing them to put out clearer sound. Only way to tell for sure will be to try them out for yourself once you get the speakers in your system though. Try just the speaks themselves set to large (no crossover) and try them on the same material crossed over aroun 60hz with the sub and decide for yourself.

Good luck.

Kensai

Depends, teh sub has to be phased right on with the speaker, bass is the hardest to control and sometimes in the speaker is better. Idealey my feeling is that real low bass a sub is better for because you really don't want that comming out of your mains to much. Sub bass you should feel and not really hear. Anyhow if you use the system for movies you need the sub you can't do souround with out it. It is a channel in the souround system. As for muxic listen and see if it muddies the sounds or add feeling to the music. If it muddies the sound try moving it or playing with the phase.