OP - I can't speak for the LBF rack but I have seen the Powertec rack and it's as rock solid. As others will tell you, the only possible downside is the chin bar which is less versitile. The other bonus is the Powertec rack has provisions to add a lat pull down/cable row later.
If you wanted to save up a bit more cash and "buy once, buy right" Check out...
Barbarian Line - https://samsfitness.com.au/packages/free-weight-training/commercial-power-cage-package or
Muscle Motion - http://www.gymdirect.com.au/shop/strength-equipment/racks/power-racks-and-cages/commercial-power-rack/
If you wanted to save up a bit more cash and "buy once, buy right" Check out...
Barbarian Line - https://samsfitness.com.au/packages/free-weight-training/commercial-power-cage-package or
Muscle Motion - http://www.gymdirect.com.au/shop/strength-equipment/racks/power-racks-and-cages/commercial-power-rack/
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