Save up a little longer, and buy pro gear. You'll never regret it.
The New Balance 450 is light, comfortable and offers great protection. I've purchased these for several guys who work for me, and they all agree that they're the best. Buy them a half size larger than normal, trust me.
Some good reasons to buy pro gear. One, it will out last the cheap stuff. It will protect you better. If you decide you don't like umpiring, you can sell top grade stuff on eBay and get most of your money back. Plus, if you find you like umpiring, you'll want to replace your cheap stuff with pro gear after one year anyway. Your cheap gear will be a waste of money.
A favorite motto of mine is "you never regret buying the best".