Just made plates to space the seat brackets, they do move back and forward still, for short people that is, haha
What you have described seems about right,
Id like to say go the SR20 i mean for ease of parts, power and reliability, i have the trust winged sump and oil cooler hangin on mine so always good to have that extra peice of mind, and with an oil filter relocation kit, makes ease of servicing under the bananna manifold
here is a pic from sunday to give you an idea of the sump and oil cooler, just try and imagine it without an intercooler, haha