I understand your dilemma, just had my third docataxel chemo session today. Forget about the 18 week myth, you feel groggy for the first week but by day 8 you're back to normal so weeks 2 and 3 in between doses you can do virtually anything particularly with the steroids keeping you going on full throttle.
Go for the the chemo and HT, my PSA is down to 1.42 from the 13.94 I received on diagnosis in August.