I had all Kimber Select silver, including 3038 speaker cables, in my main system, and all Kimber Select copper in a second system, including 3033 speaker cables. While it is important to point out that cabling is very system-dependent, I found that the 1030 all-silver interconnects were noticeably better than the 1021 all-copper interconnects. As for the speaker cables, however, they were actually quite close and it was hard to justify the big increase in price for the 3038. This was with three different amps and three different preamps. Again because synergy is important, you may have very different results, but in my experience in my systems, I found 3033 to be very, very good.