The FG with the 3000X is far better than any analog FG sold today or those under $ 1000 500 for various brands.
Given that Agilent just released a whole bevvy of FG +/- AWG, all with ever increasing prices, it really comes down to specifying what you need, so you can buy it. If sky's the limit, so is the price. Once in that price range, the competitors also play, but who wins depends on who meets your requirements best, including price and end user support.