upgrading caps -- easy to do?

Thanks to all. What should I look for when purchasing the caps?

Do I need any schematics from Martin Logan? What is a good source to buy the soldering iron, solder, caps, etc?

Dennis: I am not convinced that this will be such an easy project. Recently, I recapped an old integrated amplifier. I only replaced the power supply caps. The old caps will be very difficult to remove from the circuit boards, and will be slightly less difficult to replace. Also, the capacitors will be difficult to find. I spent HOURS looking for capacitors. I found a company called Mouser Electronics. Obviously there are companies that sell Black Gate caps as well. Personally, I would not undertake this project, being a fellow novice. If you do, I would strongly suggest buying a desoldering tool and a good soldering tool.

Do yourself a big favor and call Jeff at www.soniccraft.com. This man knows his caps. He will walk you through the upgrade process and save you some $$$ in the end.

WAIT!!!
The replacement of the caps IN a speaker crossover is not the same as caps in a circuit in a electronic device.
The caps in a crossover have a direct influence on the voicing of the speaker, and swapping out the caps MAY alter the sound in ways you will NOT like!
Usually changing the inductor coils is less of a problen with alterations in the apeakers behavior.
I would be leery of doing the caps, And expect that you may need to experiment if you do!
Also see discussions about using small value additional caps to enhance ??? (don't remember, freq response or speed? anyway, plenty of talk on Audio Asylum in speakers areas, do some research there!)

You should get the crossover schematics if going ahead with the project. Some OEM caps don't tell what they are! nor do inductors!! A good source for caps and inductors is Micheal Piercy audio, also a couple of other places sell all the stuff... Inductors, caps, wire. The variety of caps you can use will make your head spin!! (AudioAsylum has sponsors, several of which sell these parts.)
If you can find someone who HAS done the same speakers with success, get those caps!
Good luck whatever you do.
(Rewiring is a GOOD idea. same places have wire available. I would use the wire in your favorite speaker cable, if it is available?)