I have that Powertec cage and it's held up very well over the couple of years that I've owned it... It does have some scratches on it but that's expected as it actually gets used. Try to avoid buying the yellow one, ask for black or grey as they wont show the scratches as much.
The only downside to the cage is that sometimes on heavier sets of bench, rows, etc the cage does move out of position slightly... This can be stopped by bolting it down or putting a 20kg plate on either side of it.