For someone who didn't know what he was doing at the start you've done a brilliant job with that P7.
Personally I'd keep it nickel as it's very hard-wearing and is not going to get any worse if you look after it. An occasional clean with autosol/wax polish will keep it looking good.
But it's your bike and yours is the only opinion on finish that matters. There are some really good powder coat colours including metallics and even silver if you want to keep a similar style.
Cheers mate, thats very kind of you to say, made me blush!!
I do love it as it is and it isn't going to be a showpiece its gonna get some use, my only concern was rusting but I would be saving myself some dosh by leaving it as is (which is my preference!). I will probably leave it and just keep it clean/polished (£100 gets me a lot of Autosol and Turtlewax!!). Just gotta sort the brakes, fit my new tyres and away I go!
P.s. Anyone noticed how indecisive I am!!