I will concur, $70 is a lot. To clarify, your getting 15MB download and 1MB upload, correct, not the other way around? So just to let you know where I am at, I have a intro Qwest DSL for $25 per month, and 7 down/1 up, which is usually about 6.5/750. To be honest, I don't think I would need, or notice, any faster speed. I would be more inclined in your situation, to look at something that wasn't as fast, for maybe half the cost. Most people aren't going to see a big difference in 20MB vs. 7-10MB for most stuff.
