Hi Rob,
i'm currently using one, replaced a 103R - Now the "R" is a great cartridge espically at the price, but the "SA" is better imho -it's smoother and doesn't have the slightly rough! top end of the "R", I also think that it gives slighty better detail.
The differences are not hugh, and you are paying a bit for the nice box and LTD status, but even given that the "SA" is still cheap formthe performance offered.
Hope this helps some how!!
Leo