Alex,
I know the local provider you're potentially working with, and it's a "You get what you pay for" issue. Comcast is oversubscribed, and bandwidth strangled. That's how they can charge less. Remember the old modem days? oversubscribed modem pools were cheaper, but crappy service. Same situation applies.
Clear is nice, but again, oversubscribed, and desperate for money.
PFsense is a great suggestion someone on here had. Free, amazing quality, and works on lots of different equipment.
It will aggregate multiple connections, bandwidth quota (throttle the Hogs!) and do most everything you need it to.
Check with DSLReports.com to find niche bandwidth providers in your region. A friend of mine in East Stroudsberg used to get 25 static IP's, 25/25 service, and paid 55 a month.
If anyone needs serious bandwidth, and is willing to pay reasonable serious money (being honest here), feel free to contact me. I can put you in touch with a few people. (Not my business, I just know people.)
Joshua