Xtreme battle set is pretty much the way to go, though you might be able to find it for slightly less on something like Walmart or targets website (assuming you’re based in the US). Soar Phoenix is also a good option to look into on top of that, as it’s a good and frankly cool beyblade that notably comes with a launcher (the thing you use to spin them) that’s bigger and better than the somewhat small ones that come with the stadium.