High Speed Sync Help

I'm on the verge of buying some flash equipment so I can use high speed sync to shoot sports in dark venues. I've found answers to nearly all of my concerns , but one. I understand that the light emitted by HSS is diminished by the nature of the process. So, you typically have to be fairly close to your subject for HSS to work effectively (i.e., produce enough light).

My desire is to use HSS flash where I am sitting 10 to 30 feet from my subject(s). In most venues the light will be significantly dimmer than typical high school gym lighting. I'd like to get at least 1/500 shutter speed, preferably 1/1000. Can I do this with HSS using the AF540 or eqiuvalent flash?

Jay
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