This is so weird, are you me? Also 27f, same income (scientist), same rent, comparable savings, although I don't have that monster equity position, well done! Putting a beau through grad school as well.
Assuming the taxable account is for the house down payment, that's a risky allocation for funds needed 2 years from now. Also consider that being single, no kids, and renting at your income level, you could hardly be in a higher tax situation, so any extra 401k contributions are hugely beneficial.