IMHO, I would not let the miles control my choice.

Instead, for example, I would research best deals from AT&T etc and go with that.

In my experience, AT&T will offer you a very low price for six or 12 months for DSL ($15-20/month) if you talk to sales or retention. And, they will continue the discount after it expires if you call up and talk to retention.

There are several threads on this on fatwallet.com (search for DSL).

Haven't seen any miles offers though.

But, much as I love miles, half off beats miles at full price.