Keep moving forward...
My first thought when you mentioned that the new fan didn't help is that there is not enough intake air, and if there is enough, maybe it's aimed to circulate the air in the area incorrectly. I experimented with baffles and other sorts of air/wind deflectors (cardboard pieces I folded... lol).
I have spent way more money than I expected to this early on and probably would've spent less if I hadn't built it all myself, but I had to keep in mind that not only will I save nearly $600 per month, I will finally have a green-thumb opposed to my green tipped booger finger. I'm actually rethinking my education/career choice now because I wonder if I should get into more of an engineering position instead of computer systems because I love building, tweaking and testing. Dream job would be to build and fly UAV's...
I pulled a few small buds off of the purple, did a quick flush in plain water for 2 days and then stuck em in my computer tower for a day, and I must say that I am still kinda shocked how good and cerebral it is. It was so good i put on my headphones and played a few rounds of Battlefield 2 (old PC game) and had a blast. My reasoning to sit and play a game for hours was that I needed to get the video card hot and the fans spinning at hight RPM to dry it faster, but my GF didn't believe it.. Anyow, i am very happy with what I grew.