Sicilian Defense

  1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 todo teorico,  6. Nxc6 bxc6 7. e5 Nd5 

  1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Hay dos contiaciones:Be3 o Nxc6.   1) 6. Be3   1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. Bd3 d5 8. Nxc6 bxc6 9. e5 Nd7 2) 6. Nxc6 bxc6 7. e5 Nd5 .

this looks like a sicilian 4 knights, rather than a sveshnikov (sveshnikov is with e5 played, rather than e6).  The sicilian 4 knights is an interesting variation as well.  Usually black plays Ndb5 instead of Nxc3.  I had a game in this line at the national open recently.  It was a very tough game in which I was lucky to get a draw (I was white).  Maybe your Nxc3 idea is good, although I dont think it is the usual approach.