I would say a 1000 and a 500. Its easier to get those multi-switches that come with the free to air receivers to work with Dish Pro LNBs. The 1000.2 is a Dish Pro Plus LNB and won’t work combined with regular Dish Pro through one of those switches.
At least it shouldn’t work. I have never tried it so I can’t say for 100% certainty. I know for a fact that you can’t use Dish Pro Plus technolgy through regular Dish Pro switches.
You could even use the old Legacy LNBs if you wanted. The 1000 and 500 gives you more flexibility in my opinion.