I have had excellent results with portra 400, which also runs well at ISO 800 and 1600. Expose well if pushing to 1600. Ektar 100 is also very nice, I like the way it does colour, it had a slight red bias. Runs well at 200 and 400, from memory.
I've also used cheaper colour rolls with acceptable results, fujicolour 200 (I think? It's in a green box) which works nicely at ISO 800, quite grainy but the push does funny things with the colours which can be used to creative effect. Kodak gold 200 is much the same but IMO seems to push to 800 better than the Fuji, it gets very contrasty with great colour rendition and grain is surprisingly low.
For monochrome a I've had good results with various ilford films, PANF and XP2, 50 and 400. Can't remember which ones exactly, although I found the 400 easier and more versatile than the 50, a lot of which had dodgy exposures. Perhaps this is par for the course with ISO 50 but IMO the 400s are great all rounders unless you want to shoot very fast on a sunny day.
I'd post examples of all the aforementioned rolls and push settings but I am only on my phone so I can't.
I have all my rolls done at peak imaging and although they've bollocksed up one or two rolls they generally come up with good results. The costs do soon add up though.