The EM0450 is basically a better and cheaper version of the EM0480. The next step up is really a few hundred bucks more. If you dont drink that much coffee, its probably going to be more than enough for you. Its an exceptionally good value grinder.
If you mostly drink milk-based drinks, its probably well and truly worthwhile stretching the budget to pick up a Sunbeam EM6910. That way you can brew and steam at the same time. Both the Sunbeam and the Gaggia have pretty big baskets, which gives you a bigger margin for error.