On my cheap musicyo 'Tobias' 5:
Rotosound Swingbass - ok
Dean Markley Blue Steel - ok
Carvin Stainless - 'peg end' of string is too large in diameter to fit into the peg's hole, otherwise liked them
DR Highbeams - loved them, but after removing and cleaning strings to refresh their brilliance, the B string was toast. The string beacme floppy and rattled, as if the windings lost integrity
MusicYo strings: when I first got this bass it had 'musicyo' strings on it. Cheap, but fabulous strings. If they still sold them, I'd be buying them. Decent tone, string life, and the gauge was juuuuuust right.
On my Tune ZiIII 6:
D'Addario XL - dig these. I have a set that has been on this bass for quite awhile. The brilliance is lost, but the bass is inherently bright-sounding anyway. I use the neck pickup and get a yummy thumpy Precision-like sound.
All are med gauge roundwounds that respond acceptably to fingerstyle, slap/pop and pick playing.