I think you are misinterpreting what is meant by a 6% match. At my last job a 6% match meant the company matched my contribution 100% up to 6% of my income. My current employer isn't so generous. They match 50% of my contribution up to 6% of my gross income. No way, no how any other investment beats this. In the case of a 1 to 1 match, you earn 100% out of the box. The best advise is always contribute to your 401K up to the limit of your employer match. Then consider other options for anything over and above that.
Your investment house goes up on the basis of the total value of the house, not on the down payment you put into it.
I have helped a lot of clients out of their 401(k)s and other tax deferred investments. We call it a 401 condo.
Also, your tax deferred programs are based on impratical misconception that you will pay lower taxes when you retire because your income will be less.
Why would you want lower income when you retire? How long will that sustain you? Will you work until your 80 so the cost of living doesn't eat up your retirement? You need to do something with a bigger band than a 401 k or IRA if you're serious about retirement.