Modifying crossovers can be very rewarding sonically. I'd suggest doing all the caps and don't forget to do the resistors.
As for what caps to use, there are many good choices to fit your wallet. Sonicap Gen I's are very good and reasonably priced. Clarity MR's are another good choice, but cost a lot more. I do not recommend Solen.
For resistors, Mills are most folks go to.
Pitfalls....make sure you have the room for new caps as most of them are going to be much larger than stock.
Some good reading, www.humblehomemadehifi dot com/Cap.html
As for what caps to use, there are many good choices to fit your wallet. Sonicap Gen I's are very good and reasonably priced. Clarity MR's are another good choice, but cost a lot more. I do not recommend Solen.
For resistors, Mills are most folks go to.
Pitfalls....make sure you have the room for new caps as most of them are going to be much larger than stock.
Some good reading, www.humblehomemadehifi dot com/Cap.html