I tried most of the games you suggested

except PF
RFonline is not a bad game, but after around lvl 30 in public servers, the grind is really really long, The quest are pretty boring but the armor are pretty urber cool and yes Race wars does lag like hell. But its fun only when you get there

If you don't like grinding like sro don't play it.
I hate Cable for some odd reason, just not my type of game I guess, all characters looks kinda the same, not much individuality.
I recommend Rohan, I was in close beta test and the game looks pretty promising

although it runs way different than sro, and you need a pretty urber graphics card to make it look like a nice game. The battle system is pretty good, they have town battles and everything silkroad can offer minus the bots (atm, hopefully there will never be bots) the Dekens and Dhans are the PK class, so they can just kill anybody hunting, I think that's Rohan's anti-bot strategy? GMs are friendly and answer questions, but that could just be close beta. The skills looks Ok, but not as cool as Silkroad I would say. So yes definitly worth a look at. I do find traveling around a bit of a hassal in low levels, since you cna't buy a mount and stuff
so yes, I think you'll like rohan try it out
