Nice write-up, and very true. Most people don't realize how much 400 whp is. I have a 20G, fmic, 850cc inj., Walbro pump, colder Iridiums, and a pro tune on my 06 STi. I have 2 maps. My 20G low map gives me 336 whp/ 354 torque. My 20G high map gives me 354 whp/ 368 torque. I run my 20G low map most all the time, and it's plenty of power for a DD. I only run my 20G high map when I want to take someone for a ride.
My point is that even though it doesn't sound like a lot of difference between the two maps, there IS a lot of difference in them. The 20G high map is not well suited for town driving at all. I guess what I'm saying is that I'm totally happy where I am, and I have no desire for any more power.
So, like he said, be careful what you ask for, because you might get it ! I couldn't imagine a DD with 400 whp ! I don't think most other people can either. If you still insist on 400 whp, then let me take you for a ride with my 20G high map, and see if you still feel that way ! Good Luck, Okey