I have tried a lot of strings, and I keep coming back to Elixirs, especially now that they have a stainless steel. D'Addarios would be my first pick, if they'd also put the EXP coating on the stainless steels. I feel like stainless steels aren't any brighter than Nickel wounds out of the package, but seem to hold that sound longer than the nickel plated strings I have used. I have a set of Stainless Steel Elixir's that are just now losing their new string sound that have sat on a bass for almost a year and a half now.
I've also used GHS Super Steels and SIT Stainless Steel strings. The SIT's last a good long while, but they were murder on my fingers.
I've never been a fan of other stuff I've tried...DR's included. The only strings I absolutely cannot stand in any form is Ernie Balls. They always seem new today, dead tomorrow.