My class was originally offered a 25k loan from USAA at about 1.5 or so, as well. NavyFed countered with a 30k loan at 0.75%. Even though I had already invested the 25k, I took out the 30k with NavyFed, paid off the USAA loan, and invested another 5k.
The difference in the rate and the extra 5k made it well worth it (although my current portfolio says otherwise).
See and that's good - you were able to cut your rate in half. I'm talking ~.2% - but the difference is made up in the fact that you have to take out an additional $2,000 than USAA anyway. In my mind, the superior service of USAA is worth that .2%.
And I forget who it was before - but yeah NFCU was not offering pre-comm loans in the fall - they started offering this one in early/mid April.