Horses for courses really.
If you just want the damned thing to work, go for the A.
If you have a SATA mobo and don't mind fiddling with all the crap that SATA brings with it (Drivers, flash problems etc.), or don't have any spare IDE sockets, or actually have a 100% working SATA system, then get the SATA version
Performance between the two is pretty much the same.
Compatibility of the A is a lot better 'tho judging by the SATA problem threads...
On a slight tangent: SA-owners, can you use boot CDs and DVDs in the SA, and is it visible in DOS?