Congratulations! Too bad about the M5 but you've got a great alternative. The E93s are beautiful and I'm sure you'll enjoy it. The 330i is quite adequate. I had an E90 330i and found that the power was good enough and at cruising speeds was just fine. I did want a little more power for passing but overall, it was still a great car. Plus, you are not in a situation to get the 335i.
Good luck on not modding. There are even more thing to do with the E90/E92/E93.