It sounds like you're almost at the point where you need to think about whether you want to work until 59.5 or get out early. If you keep plowing into the 401k, you'll no doubt beat the returns of the house on a strictly net worth number. However, if you want to get out of the 9-5 earlier, having your house paid, non retirement investment accounts, or income producing real estate are absolute musts for you. It seems to me like you're crushing it on the 401k/Roth fronts, so you want to get more into your bridge accounts.
If it were me:
1. House paid off (I don't want to pay my mortgage anymore)
2. Max our all retirement accounts
3. Roll Pretax Retirements into Posttax Roth Accounts
4. Taxable Accounts/Real Estate/Annuities/Etc.
5. G-650