Hi,
I underwent a BHR at age 21, on my left hip and it gave me a new lease of life. At 30 today, its still good as new. THR is definitely a no-no for you given your age and expected function. For somebody our age, THR is very restrictive and may require revisiting every 6-8 years. BHR is a one time thing. You can do all physical activities, the possible exception being bungy jumping.
Go for BHR, I did it in India under Dr. Vijay Bose in Chennai. You can pm me if there's anything specific you would like to discuss.
For more information, you can join a BHR group on Yahoo (Surface Hippy) or on LinkedIN, to get more specific information and experiences.
Ankush