Having a flow bench, I would suggest finding one and flowing the head with and without a valve, you may find the air just cannot get to the chamber no matter how much lift or open time you have. I bring this up is because more valve lift doesn't always make for better running engines, it's the amount of flow the ports will handle.
Low lift flow is more important to throttle response then maximum air flow is. The valve is at partial lift twice per cycle, only once at full lift. The more low lift you can get, the better the engines run. Air speed is also very important, the faster you can get through the port, the better the engine will run, crappy port design and air speed do not go together. Bigger holes equal slower air speeds, so that doesn't work either.
Once in the cylinder, the air has to get out, look for 75-85% exhaust flow to intake flow or the engines will not run as they should. To much exhaust flow is as bad as not enough.
