Realized right after I posted it that I should be more specific. I'm not enough of an audiophile to have a specific sound signature that I'm looking for. I currently own a set of Jaycar Pro Monitors (Brainwavz HM5 rebrands) and a pair of Tascam TH-02's; haven't owned/listened to anything else really. Think they both sound pretty good but don't necessarily have enough experience with other headphones to really pick apart the nuances and specific details. If I had to pick - maybe something slightly on the bass-y side but not full blown basshead. I'd defer a sound signature to your good judgement based on what I listen to though. I typically listen to electronic music (e.g., electro-house, deep house, trip hop, EBM, complextro, etc.), hip hop, and classic rock. Definitely don't need Bluetooth but would be kind of nice when I'm running. Would you be able to recommend an IEM with Bluetooth and one without? Planning on using my Galaxy S7 Edge and my computer to power this. No running in the rain for me. I could likely stretch my budget a bit...$30 maybe if it's really worth it? Cheaper the better though; right around $20 would probably be the sweet spot. Should probably mention that while I typically use my Tascam TH-02's in the office, they're not the most comfortable thing in the world for me (even with HM5 pads) since they're slightly too big. Would likely switch between my TH-02's and these new IEM's so comfort is also pretty important. Wouldn't mind replacing my TH-02's in the office completely if these are good enough. So I guess these IEM's could potentially be used for a lot of things - commute (i.e. walking), running, and cubical life.