Besides DR, Rotos are the only other string I'll use. They have a great sound for rock. They will sound pretty snappy and bright when you first put them on, but they'll break in once they're played a bit.
Until I tried Lo Riders, the RS66LD is all that was on any of my basses. I still buy them too, about 3:1 in favor of the DR's. I still like Rotos on at least one of my 4 strings at all times. They get a killer raw tone for certain stuff.
You might find them rough on the fingers. I never really minded because stainless is all I ever play. Give them a try, then when you're done, maybe check out the Lo Riders.
