I've been meaning to restring my P Bass with strings different than rounds for once... I want something different than the aggression and brightness that my 66 Roto's deliver, more like a thumpier and brighter sound for when I play either fingerstyle or pickstyle. I've been thinking about Roto 77 Jazz strings, which seem just fine, but lately I've read that McCartney used a set of Roto 88's on Abbey Road, which is exactly the kind of picking sound I want. Should I try flats or the tapes first? What are their pros & cons? How much of a difference is there between the 2 types? Cheers.