Look at the install or launch guides here:
http://www.satelliteguys.us/826671-post1.html
They will show you what the Dish 1000.2 looks like. Pay close attention to the LNB's that are attached.
It is my understanding that the 129 satellite is older and doesn't run it's transponders at double power like the 119 and 110 birds do. I don't even know how many transponders on it are still functional. I'm sure some have failed over time. (I believe that bird is Echostar 5)
Echostar 5, 6 / Ciel 1
If you have a Dish 1000 it should have 3 lnb in 2 cases, one narrow and one double wide. The dish 1000.2 has just 3lnb all in one case.
My wife wasn't happy when the HD for Fox went out on Sunday during the Vikings/Green Bay game. She ended up watching it in Standard Def as Fox is on the 110 bird in standard def.
Looks like I'm going to go with a second antenna. Seems like the best option to help with strength. I would think a single Dish 500 peaked for 129 will be stronger than a Dish 1000.2 trying to compromise most of them.
Note we have lost HD signal a lot this year due to the low power at 129. Standard Def stuff will keep working when the HD goes away. That due to all the light rain storms we seemed to have had this summer.