I do bodybuild i just dont want to bulk because it will affect my other sports activities. You can bodybuild and still have that thin, lean, cut look like a martial artist. Isnt there a lightweight division in bodybuilding?
I have never used EPO or GH, so I cannot make comments regarding those PED's.
It seems to me me that many cyclist/endurance athletes use Testosterone at a low dose and do just fine. I'm not sure exactly why you think Testosterone = big and bulky. This will vary greatly depending on your dose and especially your diet.
Testosterone will assist you perfectly fine with your stated goals without the risk you would run with EPO, and is much, much cheaper and more readily available than GH or EPO.