I've been wanting to buy my first mac since Novrember and have my heart set on a dual2 G5. A friend told me to wait until after the MacWorld Expo because Apple would announce upgrades to the G5 which would make the dual2 less expensive. So now it's after the expo and my question is whether I should wait longer or go ahead and buy now. Is it still possible there will be an upgrade soon? Anyone have an idea how much the price of a dual2 will drop when the next one comes out? Thanks!