Probably it is interesting for you that we are also working on some deck which uses Perilous Research and Hatching Plans in germany. As an additional sac outlet we make use of Drinker of Sorrow. The Drinker is our primary win condition besides Tinker DSC and it works very well during our tests.
I thought about using Phyrexian Negator or Drinker of Sorrow as a win condition. Up until now, I have to admit that I never tested it.
Can you provide use with some feed back? Especially when it comes to the sacrifice effect of Drinker : is it good? Cause except when Hatching is on board, you don't want to sacrifice a permanent.
In our lists we use both of them Negator and Drinker. The sacrifice effect doesn't really matter because you have so much carddraw that you should have enough permanents to support Drinker of Sorrow. You can also sacrifice unused lands to the Drinker because our deck just needs three mana. This builds up a well performing draw engine with Plans, Drinker and Perilous Research.
Yawgmoths Will also gets stronger if you have sacrificed permanent before you play it.