KZ ZST perhaps? You can buy them off the German Amazon, they are cheap and have plenty of bass as far as I’ve read. There is a thread on here somewhere talking about the soundstage.
I’ve ordered some for my girlfriend, pretty curious. There is a version with mix and one without mic, which differ by $1 I think.
Search for anyone that own a pair an give them a try. Is really subjective to evaluate a pair of headphones from the spec sheets and reviews. They are a guide but every situation is different and every ear is different!
The BLON are a cheaper option, didn’t try them but they are raved everywhere.
Good luck with your search!
Here is what I would suggest getting.
They don’t need any modifications, they come already with a really nice wire and lots of different tips to try, really the complete package. The bass is much better than the Tin T2, and they have good soundstage. The great thing is they are shaped to a human ear much better, and are one of the most comfortable budget IEMs. If you can afford them, they are well worth the money, and compete with some much more expensive stuff. All the colors are the same model, just look different.