I drive a POS 626 that's been in the fam for 15 years. Next year the 135i is on my list of prospects along with the STI. I could have purchased a new vehicle by now but chose to drive the POS until I could afford what I really wanted. Sure I'm suffering now but next year and hopefully many more to follow will be completely worth it! Believe it or not 2008 has been my planned purchase date for 3 years now!
I bet in a few years a used 135i would be just as much fun to drive as a new one and much cheaper! Good luck, keep that as a goal and start saving!