Keep in mind the compressor maps for each turbo, and the CFM that your motor requires to reach your HP goal. A smaller turbo will spool faster, but won't give you as much HP at any given PSI as a larger turbo. Inversely, a larger turbo won't spool as fast, but yields much higher HP gain. A smaller turbo also contributes more heat, since heat and pressure run together.
You will want a midsize turbo, at under 7 psi, properly tuned. The weakness is the piston, not the rod or crank journals.
I read that you can double your hp, while only adding 20% more load to the rods. That's not bad. The problem with the H22 pistons are the weak ring lands. The F22 starts with lower compression and has a sturdier piston. I believe that a turbo H22 would stomp a comparible F22, but keep in mind the limitations. Set goals, and do what needs to be done to complete them.
Read "Maximum Boost" by Corky Bell. Good read.