Thinking Kodak gold 200
I'm mainly looking for a general colour film to move up to from my agfa vista now I seem to have my technique going the right way, mainly improve the detail and the bring more colour out.
Portra really is probably the best colour negative emulsion ever released, although "improving detail" probably comes down more to scanning than any film - even Gold probably resolves a decent amount of detail, it's your scanner which will be the limiting factor.