Hi and welcome to the vine!

Just my two penn'orth: we bought a polycarbonate greenhouse and had to sell it again because the panels were like corrugated cardboard on the edges, and were fine the first time you slotted them in but if you didn't get it just right the edges feathered and were impossible to work with. Also, the first high wind blew out seven panels, one of which landed in a nearby field. And then we couldn't get the raggedy edge panels back in again... So we've gone back to glass!

That said, I have no experience of the actual greenhouses you describe, and if your garden is sheltered, you shouldn't have a problem. But if you live anywhere windy, just bear that in mind...

Best of luck anyway - you'll never regret getting a greenhouse