Event TR6, M-Audio BX8 or Sampson 80a?

I've been recommended these monitor speakers in a $500 price range:

M-Audio StudioPhile BX8
Active 65W Bi-amped Nearfield Monitors with 8" Woofer (pr)

M-Audio Bx8 $479.97

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Samson Resolv 80a
Active 75W/25W Bi-amped Nearfield Monitors with 8" Woofer and 1" Titanium Dome Tweeter (pr)

Sampson Resolv $399.97
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Event Tuned Reference 6
2-Way Active Bi-amped Nearfield Monitor with 6.5" Woofer and 1" Silk Dome Tweeter (ea)

Event TR6 $199.97 (ea)

I'm not going be able to actually hear one of these speakers here in Puerto Rico so I'd appreciate your opinions.