You mentioned that you might consider one in the living room and one in the bedroom. You can only get one DVR with U-verse. Currently you can only record / watch up to a max of 4 different live streams per household. The profile that you end up with is based on the actual performance of the connection once the install is complete.
The internet package is not directly related to the IPTV package you order and the number of streams supported. IPTV will always have a higher priority over internet data. Any HSIA speed tier above 12 Mbps will be impacted (adjusted down in speed ) by the number of streams of IPTV that are active at any point.
Max 12/1.5 will stream video just fine.
PQ on U-verse for HD is not quite as good as DTV so your experience will vary based on this initial PQ factor and any and all issues related to the install and the quality of your connection.
Now some specific South Florida feedback. I have only had one outage since moving to U-verse from BellSouth in 2009. This outage was when a tech took my F2 pair while connecting another customer on the block for U-verse. Outage was just over 1 hour.
You may be seeing issues with your current DSL do the the turn up of U-verse. When they were installing our VRAD and conditioning lines within our block we had a number of short outages while all P-commit pairs were tested / repaired.