[j-nsp] How many ways to connect

[Cyn D.]

We are considering having dual connections to TWO ISPs on ONE router (M120), what's the best way to connect?
- receive full routing table from both ISPs;
- receive customer routes and default from each ISP, make one default more preferable than the other;
- others options?

In option two, if there a way to load-balance "default traffic" between two isps?

Thanks in advance. 
 
Cindy