I looked up the 755 on the web and went to Icon Health and fitness, downloaded the owners manual and read through it, it actually said 300lbs max capacity on the bar, I called their customer service hotline, the rep did not know what I was talking about and at first told me they did not sell such a product, I asked why if they did not sell it, would it be listed on their site, and he said they no longer sell it.
The reason that it has a low capacity is not that the cage is not very strong, its that "easy to use crossbar" that allows you to adjust it up and down like a ratchet,,,,its "ease" in adjustability makes it much, much weaker than a traditional power rack that has holes for the cross pins to go though,
I cant tell much from looking at the bar set, but I rarely if ever suggest buying a weight set that has a "bar and X number of weights ( I know he is re-selling it, but it looks like that is how he bought it) why? in every case, the bar that comes "with the set" is an abolute piece of communist third world piece of crap. Its better to buy the bar seperate ( JESUP) good 1,000 bar that will cost 100.00 and will last for life. If you ever could look at a good bar ( and I am not even talking about the really good bars, York, Eleiko, etc) but the good ones and then compare it side by side from the 300lb Dicks Sporting Goods special, you will see that there as much of a difference between the two as there is between a chevette and a corvette.
Buy the olympic plates used, with lots of rust, get deep dish hubs if possible, they will make you stronger.
I like the weight tree, maybe the best part of the whole package.
I think you could spend your money better on something else
keith