What dog breed should I get now I already have a Dalmatian Advice or suggestions

I'm 13 years old and I have a beautiful, well-trained, housebroken, 10 month old, lively liver spotted Dalmatian who I love to death. I got Liam when he was 8 weeks old from a very reputable breeder (AKC registered) who tested her dogs for hip and elbow dysplasia and BAER tested them. I have done my homework on a lot of different breeds and am very responsible and ready for another dog. Before I got Liam, mom told me that if this dog turns out to be well-trained (I did it all) and looked after (by me), I could get another dog - so she has lived to that promise. I take full responsibility and even paid $40 to microchip him, $150 to vaccinate him and $230 to fix him ALL with my own pocket money that I saved for him.

Mom does not want any long haired breeds or any small dogs. We have 3 cats aged 5 years, 3 years and 2 years so the dog needs to get along with them. Breed must be active and must need a lot of exercise as I walk Liam twice per day for 1 hour each time. I would like a ...

Wow, congratulations on raising Liam so well. You are definitely one of the most responsible 13 year old I have ever seen if you take such responsibility for your Dalmatian. Also, I am very surprised that you have done your research and have learnt to spell Dalmatian! Even some of the "dog experts" here can't spell Dalmatian right. I've owned a Dal before and I'm getting another one in August so kudos for picking such an AMAZING breed and for providing that youngster with so much exercise!