What is best practice?

My current MT systems connect to Internet through Frame Relay.

cloud<—>Cisco<—>MT/UM<—>MT/HS

I want to put up a new site but to use DSL for connection to Internet.

cloud<—>DSL<—>MT/HS or maybe cloud<—>DSL<—>MT/UM<—>MT/HS

What should I look out for with using the DSL front end? I guess any advice on possible routing issues, addressing issues or other advice would be very appreciated.
Thanks