The Equalizer is worth the extra effort/money/etc. Get the 10K as the 6K will not be enough.
My parents are pulling their 26BH with the E2 8K and I'll be replacing it with the Equalizer at some point. The E2 does the job, but the Equalizer does it better and arguably safer in sway conditions.
If money is tight then the E2 will work, but keep in mind that I got my Equalizer 10K gently used for 50% less than retail which is even less than the dealer was selling a brand new E2 for.
2013 F-150 EcoBoost MaxTow
2013 Jay Flight 28BHS Elite
"My wheel lugs require more torque than your Honda makes!"