i agree with the federal. there is also a brand new, wildly hyped restaurant living at the site of the old basketball hall of fame. it's called onyx and friends have said it's really good: www.onyxfusion.com.
another new restaurant in springfield that i have eaten at is called 350 grill. the decor is wonderful and the food was great [the sea bass special was amazing]. and, it's really inexpensive.