I've got a standard SA58. The only difference is the fixed magazine and stripper clip top cover. Basically, you end up with a FAL that you load like an SKS. Buy plenty of 7.62x51 stripper clips and have fun.
The DSA rifles are very nice. Unlike most FAL's on the market, they are made will all new parts and come with a good warranty. On the other hand, my parts kit rifles shoot just as well for 40% less cash. You could probably build your own with a fixed mag and save quite a bit unless you're dead set on a DSA.