Since you said "FIOS", I'm guessing that means that you're in Verizon territory. I don't know if it's because of their isolated terrain around here, but Verizon service is outrageously expensive. You need to find a competitive carrier that has their own loop.

I just moved my office from a single T1 from Deltacom via Verizon to a 6Mbps symmetric from TW Telecom for an increase of about 40%. I'm not necessarily recommending TW Telecom, but you just need to shop around.

Actually, it's worth pointing out that getting the same T1 from Verizon directly would have also been about 40% more, for the exact same service. Well, it would have gone through Verizon's network instead of Deltacom's, but it's still the same bandwidth. So even just finding a regular CLEC may save you some money.