AntiCables v. Morrow?

Looking to buy 1st cable upgrade from #10 wire. For Ohm Walsh 100-S3s and Spendor S3/5s running off ATI 1502 Power amp with CJ PV 6 tube preamp and Cambridge 740C. Listen to lots of jazz, female vocals, blues, acoustic music. I found the preamp softened and warmed up my sound taking off what I thought was some edge but as an older amp some detail too. Trying to decide on what kinds of speaker cable to move towards. Cant afford to go truly esoteric...$200 -300 max. Can people give me a sense of the relative benefis or tradeoffs between the two companies and the types of cable they sell?