From my experience, slinging from Comcast ( San Francisco ) to the Philippines at your download speed of 1.6Mbps should give you good quality, but not HD quality. It also depends on time of day since the international circuits between US and Asia are highly used.
I usually sling between 1.2 - 2.6 Mbps from a 4mbps Comcast upload, whether i use DSL at 3.2mbps DL or 100mbps DL via fiber. It also depends on what stream settings you are using.
You can email me at email@example.com if you need more assistance setting up here in Manila.