I have home studio 2002. I would go with that,since if you upgrade to Sonar, the interface is the same.
Also, if you can afford it, get home studioXL
since it has the DR008 drum machine sampler
Dxi plug-in. Great program for the money.
Powertracks is good if you don't want to
spend as much. But it makes more sense to
me to invest our precious time to go with
cakewalk.