What is the best way to install a SATA HDD on an old PATA pc?

I want to install a new SATA HDD on my old XP system which motherboard (MSI KT4V) does not have SATA support (it also only has PCI ports rather than PCI-E). Is it better to buy a PCI SATA controller card to fit a new SATA HDD to, or to use an IDE/SATA converter to connect the SATA HDD to an IDE port? (motherboard supports ATA 133.)

Hope someone can advise, thanks.