Hi!
I was also shopping for a kitchen recently and here are my recommendations:
Howdens - Good choice for a budget, but limited selection. Quality can vary, but overall, unless you're looking for something super specific, it's fine.
Nolte - Very good choice, but twice the price. If you're concerned about the quality of the materials (like melamine resin), you might want to think twice, especially if you're looking for durability.
Ponneghaus - They have some good options and are slightly cheaper than Nolte, with good worktops (like quartz). If they're priced similarly to Howdens but with better materials, they're a good option.
About melamine worktops: they're cheaper, but not as durable. For kids, something more durable like quartz is a better choice.
Good luck with your choice!