alright fast reliable...
Swap out the motor, b18c should make a good platform
build and sleeve the motor (this should be done professionaly because we want reliability)
Now for the Fast
Purchase a Full Race B series Kit, upgrade turbo to a ball bearing of your choice
Gonna need a 3in exhaust to be fast
gonna need some serius suspension upgrades to help put this to the ground
Have to have the best management possible so your getting some form of stand alone like hondata or AEM
You will also need some guages to make sure your car is working right
OH, dont forget a boost controller, cant go fast on wastegate pressure
Then there will be a number of odds and ends that you will need and to make sure your getting the fastest most reliable set up this should all be installed professionaly and then tuned carefully. After all is said and done the above list will probably come to cloose to 10 to 12k BUT youll have a very fast car that is rock solid