A few things to keep in mind...
Cage bar spacing for standard budgies (parakeets) or English budgies should not be greater than 1/2 inch (12.7 mm), or they can get their heads stuck between the cage bars. Some budgies are quite small, and cage bar spacing of 3/8 inch (9.5 mm) is necessary. The cage you're looking at is lovely, but it is designed for larger birds.
Length is more important than height. I use 18 inch wide x 18 high x 30 long (46 x 46 x 76 cm). Excess vertical space will go unused--your birds will just use the upper area almost all of the time. As a minimum, they need to be able to stretch their wings fully and to flutter from perch to perch.
Be sure that there is a tray on the bottom that is easy to remove for cleaning. It is best if there is a grate on the bottom of the cage so that droppings can fall through onto the substrate where the birds can't step in them. (Newspaper as a substrate works fine--don't waste money on expensive cage liners.)
I use green fine mesh shade cloth that I get at my local hardware store around the sides and back. It makes the birds feel more secure and less exposed, and it prevents most seed husks from flying out of the cage.
Easy access to food and water trays is helpful. Avoid plastic trays--they harbor bacteria. If necessary, I'd rather use ceramic dishes accessed through the main door than to use plastic trays accessed through small side doors. Keep food and water apart, and don't let either be under perches (poop prevention). Remember that budgies love to bathe, so a wide, shallow dish of water is appreciated. A third dish for greens and veggies (lettuce, shredded carrots, lima beans, etc.--NO avocado or onions, as they are poisonous to birds) is a good idea.
A variety of perch sizes and shapes will help your budgies keep their leg muscles and tendons in good shape. My budgies love their swing, too.
I hope this helps. Enjoy your new family members!