Well.... it depends.
Well, I voted as if I was in your shoes. So, it really depends. Are you already commonly active with off roading? If you are, and commonly find your gray cloth seats now turning a dingy brown, well, I'd get those seat covers ASAP. That's my particular situation. I'm one year into ownership and I'm loving the off roading capabilies even in stock form. But, what's frustrating is getting dust and dirt all over the gray cabin! Someday, I'll resale this vehicle, and I don't want dingy, dusty brown seats that are worn out.
Also, you already have a stereo. It's not great, but hey, it works.
Buuuuuut, another thing to factor in is that Clazzios seem to take a long time to receive, especially if you custom order a design.
IF you do most your driving in the city, and don't have an issue with dust and dirt getting in your cabin, go for the stereo.
Good luck!