It really depends how much you would like to spend. The more you spend the more controls you will get. Even something like this:
Veroproof.com
or even super cheap as this:
ZEDOnet | PrintFab Mac OS X | PrintFab - the Printer Driver RIP for Mac OS X
It may work for you. But do you have any basic linearization with them? Nope.
Step up to ColorBurst rip.
Do you get global visual color matching controls in the rip software even if your proofs are within let say ISO or Gracol2006 specs in ColorBurst? Nope.
For this you would want to step up something like efi. Do you get selective color corrections with efi? Let say, you want deeper, darker, blacker reds. Nope again.
For this you will have to step up to GMG or CGS.
Test, ask for demos and educate yourself.