Should I recap my speakers? If so who can do it?

I would contact Peter at PBN Audio. He is very honest, he has built many a speaker, amp, pre amp, turntable.  Will not blow any smoke up your speaker so to speak. He is a old world craftsman when it comes to the repair or making new. With lots of electronic knowledge.
Good luck

Just read this thread and I gotta say it's really cool that grannyring and timlub chimed in to help the OP out. It's a testament to the the "brotherhood" of those that are so well versed and experienced to help out a fellow audio appreciator in need. 

Wow! Thanks for all the responses! I appreciate all the information, now I just have to think it over. 

As for where to buy the parts, there are several really good sources. I tend to use Michael Percy Audio and Partsconnexion.

When I got serious, that is when I retired, I built a break-out box to test capacitors for speaker applications. My experiments (two alternative forced choice, single blind paradigm) showed that the most important variable is technology: film and foil is best alternative, then metallized, then other. Second most important is materials: among the metal foils silver is best, but prohibitive; copper almost as good; tin is cost-effective; aluminum can be problematic because of the connection between the wire lead and the metal foil. Among the insulating films, styrene is most neutral, teflon somewhat bright, polypropylene somewhat muted. Third most important is brand.

The best manufacturers are very open about the technology and the materials they use - they brag about it, and for good reason. You can profit from their openness.

I did my speakers with caps from Erse. VHQ metalized film. http://www.erseaudio.com/Products/PulseX
Very reasonable and I could not be happier. Excellent sound.
No need to change resistors. I would however, remove the FASTON connectors and solder directly to the board. Ditto if FASTONs are used on the drivers.