I, too, have a Dish 1000+, and it provides very good signal for 129. I was suprised, really. The installer explained that, for the most part, in his installation area (a large suburban area of Los Angeles) 129 comes in very well with the Dish 1000+. In fact, the 129 signal is STRONGER with the Dish 1000+. If you are in the LA area, then I think you are OK.
However, very soon, the whole 129 signal strength issue will be moot as Ceil 2 will be operational within weeks (certainly by mid-February), so I don't think you are going to have problems, or at least they will go away by February. So, go ahead and take the 1000+. Also, it does look better than the 3 dish solution I had. Signal strength on all the other sat locations is just fine.
I am on the east coast with a 1000+. The dish seems to do better overall (less rain loss) and much better w/129. With my old 110/119/129 dish, 129 would drop with just a moderate rainfall, but now it's gotta be really heavy. When it does go out, it's only for a few minutes. 1000+ seems to be a good choice.