For their price the Apple Airpods ($159) really are at the top of their market segment. You'll get the in-ear design you prefer and 3-5 hours of listening time per charge and another 3-5 hours after placing them in the charging case for just 15 minutes.
Being an iPhone user you also benefit from features that an Android user would not, such as the simple pairing (W2 chip functionality) and, for lack of a better name, the "take one of them out of your ear to pause music" functionality. Because these do not use silicone ear inserts the fit on these will be subject to the shape of your ears. If the earpods that came with your phone fit you well then these will also, the form factor is exactly the same.
The primary competition for this product are going to be the Google Pixelbuds, same price ($159) and battery specs but these are not fully wireless (buds connected to one another by wire) and getting them into and out of the charging case is a little finnicky.
Another notable mention in this price range is the Jaybird Run, at $179.99 retail.
I've done some window-shopping and although I don't think I'll ever have the cash to splurge on them, the Sennheiser MX-550-X bluetooth headphones are an interesting offering. Although these tout about 8 hours of battery life (charged via micro usb) the fairly unique feature of these are that the battery is replaceable, so theoretically you can have all the nice noise cancelling features and the incredible sound-stage we have come to expect from Sennheiser over-ear headphones, and you can simply carry extra batteries to swap when needed. There's a lot more cool tech on these so if you really are looking for a premier headphone check it out.
All of the headphones above are fully featured for a smartphone and include some form of media control on the headphones physically, as well as a microphone.