Grado is a great choice that's more about sound quality. SR60 and SR80 range is a great bet at around $79 and $99 respectively. And you can swap out the pads for either on or around ear fit (flat, L and G cushions are interchangeable).
If you want something like the look of Beats Solo, grab a pair of Jabra Revos. The wired ones can be had for as little as $42 online. Foldable, removable wire, plugs on both sides to swap or share music, much better build quality (check the vidoes), mic/remote, white or black, and better sound. They make a bluetooth version as well.
If you like color and good sound and a retro look, the Sennheiser Momentum On Ear (original/1.0) are a nice option starting at around $70.
If you just want something inexpensive that looks a bit like beats and has a similar color selection, check out the UrbanEars Plattan. They start at $40 on Amazon and have a full set of colors. I'm not sure what the sound quality is, though.
And don't forget about the classic Sony MDR7506 ($85) and Audio Technica ATH series (starting at $60). There's a reason so many industry folks swear by them for studio and field work. Basic, black, stand up to abuse, sound good.
Realistically, I suggest trying out various models in person. You're looking for a comfortable fit for however long you'd prefer to wear. And the right sound for you (a neutral sound vs heavier bass for instance). And the right style. And deciding if you prefer on-ear or over ear (some folks prefer the feel of one vs the other) as well as open or closed cups (open lets in outside noise as well as air). Or you could go the in ear route from basic earbuds all the way up to $1000+ custom-fit professional in-ear monitors.
I'd recommend Bose QC25s. They probably have the best noise canceling in the market too, and they have amazing return policies and exchange policies (they'll let you exchange 10 year old headphones for 50% credit to the latest model).
DT770 are available with different impedances and 250Ω will be too high for low-voltage outputs, I often have to run my Phone / Laptop almost on "full volume" to compensate, so better buy the 32Ω version.
- HiFiMan - Grado - Sennheiser - Beyerdynamics - AKG - Philips - Marshall - Audio-Technica - Brainwavz
There are many other/niche brands as well. There are several great audiophile magazines that can help sort through the options.
Most brands have headphones that will do fine without, but some of the higher end options may need a DAC to power the headphones (e.g. the DragonFly USB DAC by Audioquest), so be mindful of that.
http://thewirecutter.com/leaderboard/headphones/
Also, it would be a crime against bargain hunters everywhere if I didn't mention that for around $99, a set of Sony MDR-7506 headphones will crush anything Beats sells.
http://thewirecutter.com/reviews/the-best-150-over-ear-headp...
I now have a Beyerdynamics DT77 PRO set that is fantastic and even more comfortable.
Sennheiser has some great stuff as well.
Best way to tell AKG studio range is (generally) the cable is detatchable. If the cable is not removable, it's probably the consumer range.
[1] http://www.head-fi.org/t/485039/superlux-hd668b-are-they-rea...