1. Probably...and there are a multitiude of option. With bandstacked you're kind limited
2. true.
3. my setup is 3 LNB's and a 4x8 multiswitch. Bandstacked is 3 LNB's and 2 switches (DP34 has only 4 outputs)
4. Other than one extra cable run from the LNB (G25) to the switch, same amt of cable
5. irrelevant. Dish is the same. You could do 2 LNB's on one dish but then there is rain fade issue

6. only you can answer that