Yeah, I'd definitely go with the DS version. Graphics don't matter nearly as much as in depth control, to me.
As far as OP, yeah. I never understood why folks had it in for OP so bad. All they had to do was not play with the pirates or XShips on GSA. Now there were a few tweaks, and Taldren didn't help anything much when they went experimenting with "balance" and then didn't bother to change it back for a while. That hurt a lot, and then all the fixes EAW got that OP had to wait for, that also hurt, but I just didn't get the overreaction to the x-ships (yeah, they weren't implemented well, but you didn't have to play with them either) and the dynaverse had major problems with the pirate layer which also hurt big (did they really think there were enough players to populate all the empires AND eight pirate cartels?) Now, I do understand the aversion to SFCIII. It was a nearly complete departure that lacked the kind of depth the 'original' versions had. I think in the end it actually did hurt the franchise. Is it an awful game, probably not, but it's no SFC.
As far as being relevant, would they be making another game in this image if they didn't care what those who take it so seriously as to keep it's life going, think?