good cable for internal speaker wiring

I rewired my Spendor S 100s with Cardas on bass and mid and Homegrown silver on top and it worked very well. Heavy on bass. medium on mid and thin on top; say 11.14 and 22 gauge. I would not use magnet wire on tweeter but a smaller gauge myself; not saying it won't work. I was going to use Cardas all round but they sent me too little by mistake. ANY good wire will be an improvement on most speakers.

Why would you not use it on tweeter? Because of skin effect? You can get smaller guage from Clairvoyant Cables.
Not that I'm recommending it over your suggestions, Stanwal.

Stanwall, did you use connectors or direct solder? If you used slide connectors, where did you get them?

There is a lot on which gauge to use on the forums; I just found that I liked smaller better. I had to use slip on because the crossover was already set up for it and it would have been very difficult to change. I found a snap on connector which makes a better contact that is made by an automobile parts manufacture for car radios; I'll try to find the box and post the part number. I got them from a local parts store but should be on the web. Cost about 5 cents each.

I used the Cardas Copper Litz wire for wiring my homemade external passive crossover to my Infinity RIIb speakers. I used 11.5 gauge on the woofers, 15.5 gauge on the EMIM mids and 17.5 gauge on the EMIT tweeters.

Litz is not the easiest to work with as every strand must be stripped of insulation, but I found that the resulting sound quality was well worth the work. Lots of details and shimmering highs. I ended up using a Demel tool with a stainless steel wire wheel, and that worked well for the stripping.