Too many variables!!! What is your job outlook for the future? How is the housing market - are prices rising rapidly or barely at all where you live? Are you in the same area you want to be in 5 years - any chance of moving into a different housing market? How is the resale market in your area - houses sell fast or slow? What's the difference in average rent vs. mortgage (for similar living conditions)? How long do you think you're going to live there? Where in Cali?? How long until you need a new car? More importantly, what kind of car do you want to purchase - new $20k or more car, or used car for <$5k when you DO need a new car (or will you walk, bike, public transportation everywhere)? How long until you plan to marry? For housing considerations: do you plan on having children early in the marriage? For the 401k, etc., what kind of plans does your employer have (matching contributions, etc.)?
If you're in an area where the housing market is just taking off, you may be able to increase your net worth quickly by investing more in real estate. But, if you're in an area where the housing market is kind of stagnant, you may want to invest more elsewhere. Don't forget, interest on real estate can be tax deductible, but it will depend on the amount of interest you have and how you file; some people, especially after getting married and popping out a few kids discover that the standard deduction is more and they don't get to deduct that interest.
But, as long as you don't have credit card *debt*, you're already in really good shape. This isn't to say credit cards are bad - by all means, if you have a card that gives you air miles or whatever for each purchase, go ahead and use it - - - IF you are going to pay off the entire balance EVERY month. Otherwise, CC's are a huge burden.