Airtrek weight is quite heavy, 2.3 stroker kit is much suitable if you really looking for power with matching the knn very long ratio fd 3.333 gb. 4G63 does not design to hi-rev. so with stroker kit, u can gain more torque than a 2.0, which is more suitable for street driving. Most prefect street driving machine will be a 2.3 stroker with MIVEC head and a aftermarket standalone ECU, such as VIPEC.
And about high compression piston up to 9.0 or above, i will advice to get a thicker multi layer gasket to compensate it. 9.0 need a better quality fuel, eg. higher ron. if you can afford 97 and above.
Find a reliable engine builder to do a stroker kit or rebuild. with proper clean engine room. not by open door with alot of dust & without temperature control, this is the basic that a mech must know. u will not know when a sand or something dirty tht stuck between the piston ring or bearing. if tht happen, u might need to fork up another money to build ur car again. worst case, whole block gone.
so do not mind to give extra 1-2k workmanship for project, send to sumone that really know it in mechanical and theoritical, the extra will really worth it. :-) happy modding