I stuck with the L6 because it was what I had for now. I can get a few good deals on some parts and its a good way for me to get the feel of driving a higher powered S30. I don't know where it will go but I may decide upon an LSx/T56 swap in the future. The power, price, weight, and availability are all there. They make for one great platform. Where as the L28 in itself has a poor flowing head. It can make easy power in the under 400 range, but, and this goes really with most engines, venturing past 400 can get quite expensive.