According to Tom's Hardware cpu comparison chart, quad-core cpu's are marginally faster than the dual-core chips.
In the 3D Studio Max benchmark:
-Core2Extreme (QX9770) was top performer @ .33seconds, cost is over $1000 US
-Core2Quad (Q6600) came in 6th @ .47seconds, cost is about $270
-Core2Duo (E6850) came in 10th @ 1.09seconds, cost is about $270
-Core2Duo (E6750) came in 12th @ 1.16seconds, cost is about $190
In most other benchmarks, quadcore seems to be less than 5% faster as well. Is it worth the extra money to get quad-core or wait. Intel is coming out with new cpu's soon too, not sure how much prices will drop.
In the 3D Studio Max benchmark:
-Core2Extreme (QX9770) was top performer @ .33seconds, cost is over $1000 US
-Core2Quad (Q6600) came in 6th @ .47seconds, cost is about $270
-Core2Duo (E6850) came in 10th @ 1.09seconds, cost is about $270
-Core2Duo (E6750) came in 12th @ 1.16seconds, cost is about $190
In most other benchmarks, quadcore seems to be less than 5% faster as well. Is it worth the extra money to get quad-core or wait. Intel is coming out with new cpu's soon too, not sure how much prices will drop.