Which is better: Aldecs Riviera or Modelsim?

[z81203]

A\l\d\e\c vs M\o\d\e\l

Hi,

I just heard aldec's riviera. who could tell me which one is better that riviera & modelsim. Are there any more asic design tools for mixed language (verilog & vhdl) simulator? :roll:

Thanks.