I'm about to rebuild some speakers and am wondering if anyone has moved from an internal to an external crossover and seen any real benefits?

Also often the internal wire used in speakers is cheap thin wire, I've often wondered if it would be beneficial to rewire using the same cable as your speaker cable.

So I'd basically have talk 3 cable going to a rebuilt external crossover, then at the other end talk 3 coming out and going to the drivers.