If I had $10K, I would have a lot of options;
-I would add take the $10K and my 2009 Boxster, and trade them both in for something even zippier, either an S or a 911. I like my Boxster, but I could stand to go a little faster.
-If I wanted to invest, I would split it between a mutual fund with a high rating by Morningstar, and a simple index fund, probably the Dow 30. (Most advisers, mutual fund managers, etc., have a hard time beating the index, and if they do, it's usually by only a couple of points. Which is spent on their fee. Unless you have access to an exotic investment vehicle, like derivatives, you'll have a hard time beating the index too. Be sure to reinvest dividends, because most stock charts include those when figuring their "gains".)
-If I wanted to invest, and have something nice to wear, I would buy the largest (natural, not irradiated) pink or white diamond I could afford, from a diamond dealer, NOT a jewelry store. I'm sure you guys haven't noticed this, but diamonds really do tend to keep pace with inflation. Check Rapaport for diamond price trends.
-I would spend a month in France, renting an apartment, flying cheap, and eating cheap.