I'd be concerned with quality of service issues with cable myself. AFAIK even 'business class' cable is a shared service, and typically over-subscribed.

Although your best speeds may be higher with cable, you'll rarely get those speeds during normal hours when the most users are on the system's backbone. Cable is also usually crippled with slower upload speeds.

T1 is dedicated & you will have the same QOS & speed all the time, up & down stream.

Just my .02 cents.

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and too little time