I like Research as well. I love cards that add to reliability. However, it looks like you can make a Golden Deck with no other Kingdom cards using Potion-Potion-Gold-Gold-Gold. You can also add a third Potion and Kingdom cards if it's more convenient (e.g., Smithy + Silver x4 + Potion x3, Mystic x2 + Silver x2 + Potion x3, Village + Conspirator x4 + Potion x2, etc.).
I'm not sure this is necessarily a red flag since most of these take some effort to build (or at least some good trashing to get the right hand in the first place), but I think it's something that should be watched for in playtesting. If it proves troublesome, you can always kill it by adding a "once per turn" limit, which prevents you from topdecking your Potions (unless, of course, you topdeck only your Potions, which probably isn't terribly useful). You could still topdeck a stack of Labs or Hunting Parties or other one-card-engine cards, but then you'd still need to draw your Potion regularly.
Interestingly, Research actually has some synergy with Alchemist: use your Potion to topdeck your Alchemists, then use Research to topdeck your Potion. This is especially useful because in many games you don't have anything to spend your Potion on once the Alchemists are gone, making Research effectively free.