Shiiiiiiiiit we all should have known abOut your personal problems, how awfully rude of us not to pay more attention to the clear undertone in your posts which shows your kid has broken his arm Hope he gets better soon though Please feel free to give us a pre announcement on a possible announcement date for the posting of pics once everyone is fit and well again
If you're planning to keep it for years and years and never want to do the bushes ever then yes, replace as they wear. If you want to handle around corners, you could spend the money better in other areas. If it's because you want to upgrade things because it makes you cool but you don't really know what you want then you should park your car in a hedge.