What Powerblocks do I get next?

Hi! I’ve been using my Sport 24 Powerblocks for about a year and a half now since I started working out with FB. I absolutely love them but I am ready for something a little heavier. Yeah! What would anyone recommend as the next Powerblock for me? I’m female, 53, 5’5” - I like lifting. I’d be interested in going up to a 50lb set. Thanks.