If you go online, you can find a good deal of kayak snobbery. If you are going fishing in the ocean, or white-water, then yes, you could justify a better boat. But if you are just going on calm inland water, you really can't beat Lifetime boats for price, handling, and features. And they are indestructible. Lifetime also makes Emotion kayaks.
One more note: if you are going inland, then yellow is a great color for a kayak - it makes you easy to see and hopefully harder to run over by drunken motorboats. But if you are going in the ocean, yellow has a major drawback: Sharks are fascinated by yellow. In World War II, the Navy found out that yellow life jackets were a very bad idea. Online, you can find multiple videos of sharks harassing kayaks, and in every case it is a yellow hull. I even have personal experience: Once on a dive I got into a school of spiny dogfish, and they took turns trying to steal any yellow gear I had. Fortunately, dogfish are small and harmless, and the whole thing was kind of comical.
Your new boat probably came with a paddle. I've never seen a boat come with a good paddle. It is just a starter, to get you going. Get a good paddle that is the right size for you. It will make a world of difference. Keep the old one for a spare. Rule of thumb: your paddle should be about your height. If you install a thick seat cushion, you might want to go a little longer even.
I regard my paddle as an emergency signalling device as well, which is why I like the yellow color pictured, especially if your boat is some camouflage shade of green.