For around the same price, you could get m40x's with Brainwavz pads, either angled or straight. SHP9500 are great allarounders. They're pretty great with all kinds of music and media. I use them for TV. Since they don't require power, I can use them on my PS4. I also use the V-moda Boom pro mic with them because they use a standard connector. V-moda cables are perfect for them. I didn't like the original cable. It reminded me of watching a censored movie on TV. :/
And they're open-back and have breathable pads which makes them perfect for when you want over-ear headphones on a summer day. They're versatile and open for modding if you want to get into to them. With the Boom Pro mic, it cost me $100. They often go on sale for $65-$75. A regular V-Moda cable goes for $10, I think.
For IEM's, outside of a Massdrop Thinksound Blue Box, I really like going on eBay and getting a pair of Sony MDRXB50s for $20. Be sure to check the listings, Some come with all the tips, some don't. Either way, I use Comply foam tips with them because I wanted to be able to run and move without sacrificing bass response. And they have a mic for more functionality and convenience. Sound-wise, I like them because compared to any other extra bass head/earphone, it isn't bass in your face all the time. It only delivers when the song calls for it, making them a pretty good fit for most types of music. And for $20 you won't feel bad about them getting lost or breaking. I treat mine kinda of badly. I rarely use a case, if i do it's a pouch. I throw them around. I put them in my pocket with my keys and wallet, and they're still perfect.
The venerable Koss Portapros retail for $50 but go on sale for $25 from time to time. Probably is and always will be the best deal in sound. No one offers that quality sound, for that price, with cheap replacement pads, and a lifetime warranty and great customer service.
The Thinksound Rain2 and 3 are fantastic. Neutral but interesting. Wood cups give it a rich sound. Thumpy ,impactful bass. Warm and lush. Goes well with female vocals. Great imaging. Was at checkout at the market. Forgot my music was on, and totally thought I was eavesdropping on a conversation some guys were having 8 feet away. It was a skit. They don't pair well with foam tips. They're low profile, but not enough to lay on your side. There's no way to tell the left from the right without shining a light, unless you mod it. Maybe some Sugru? Often goes on sale for $75-$90. I found them cheaper on their website, compared to Amazon, which was weird. Honestly, if your limit for iems is under $100, I don't know if you can get better. Massdrop's blue box was a great deal. I wasn't lucky enough to get the ms or the rain3, but it was still half off. They can be worn above the ear or normally.
The mdrxb90 is a fun purchase, because they're a Japanese exclusive that is no longer made. Got mine for $75 on Amazon. Nice case (soft, but sturdy), flat cable, lots of tips and not just sizes but styles. The hybrid foam and rubber was my fave. Like the XB50, it's only bassy when it calls for it. No awkward congestion. It's actually less obnoxious than the xb50, but more refined. Kinda big though. But they're pretty. Not peaky in the treble but still fun.
The MEE Matrix 2 and 3 are great for bluetooth option. especially with brainwavz pads. They don't exactly excel at anything. But they also don't suck at anything. On the 2's, I get some audio lag when streaming from my pc to ipad. But I just adjust the latency. Not a problem, just not convenient. And I don't know about the 3's, but the blue power light on the 2's in a dark room is insanely bright. Had to cover it with electrical tape. And they easily last the 20 hours they claim on the box. And that's at fairly loud volume, enough to drown out the world. I don't know if there's a built in standby mode. I've left them, nothing playing over night many time and never had a problem with power. They're great for doing chores (no cables to snag), the bath,..
None of these are really great for treble heads. I mainly like the cheaper stuff to see how much sound and build quality I can get for as little money as possible. And of my nine(?) heaphones and 7(?) iems, these are my faves.