Welcome here!
RW: no hum in two positions. A baseplate fattens up the bridge-pu, so a good idea. Choiche depends on what tone you're after/music you play. I have the IT's in an HSS swampashstrat and they're quite full for a singlecoil, yet gritty and with bite. Turn the vol.knob a bit down and you're in Frusciante-terrority. The Slowhands have more mids and less sparkle, at least to my ears. If you're guitar is quite bright, maybe you want Slowhands. For modern rocktones you might consider Trilogies.