You just forgot to tell a few details...
Shall your card go in a Pci slot? A 64 bit Pci at 133MHz? A Pci-express 1.0 1x, a 2.0 4x, a 8x...?
Do you want Sata1500 ports? Sata3000? Sata6000? 2 ports, 4 ports, 12 ports...?
What OS shall it have drivers for: W95, W98-Me, Nt4, W2k-Xp-2k3, V-7, 32b/64b...? Mac, Linux...?
Do you want Ahci? Connect optical drives? Boot on it? Exceed 128GiB, 2TiB?
--------
In case you want 4* Sata3000 on a 32b Pci with Ahci for W2k and later, the best ones have a SiI3124 chip. You can burn the Bios from Raid to non-raid at will; take the corresponding driver.
For Win98-Me and a 32b Pci, then only Sata1500 without Ahci: SiI3114 chips. Same story with the Bios and drivers.
To exploit the throughput of one recent disk, or several ones, a PciE slot would be better.