Will you be doing anything different in the future with the intake manifold and headers? Custom made headers and 626 IM maybe? I suppose the 626 im would only help you in the higher rpms though and with being in 2nd and 3rd gear most of the time that probably would not help you. Did you remove the VTCS and port and polish your 2.0 inake manifold?
Right now the AWR seems to be the best bang for the buck. I custom set of headers would run well north of $1,000 and that really cuts into my tire budget. The 626 manifold is tempting, but I don't think it will help. The Protege needs the power down low for pulling out of corners and it doesn't seem that the 626 manifold helps down low. My head is ported quite a bit and the intake manifold has the VTCS removed.