Either scheme should work.
The 2-port splitter in the first diagram MUST have DC Pass capability. You can use any splitter that is rated for satellite service that has diode-steering DC pass for that one. The other one does not need the DC pass feature, so any cable-rated splitter will suffice.
I suggest the Ideal-branded splitters available in-store at Home Depot.
http://www.homedepot.com/p/Ideal-2-4...-332/202276264
http://www.homedepot.com/p/Ideal-5-M...-134/202276261