I don't own either of the EDCs, but I do own the PX and really like it. If you're looking for an entry-level audiophile IEM, it's a great option. The only thing that concerns me about recommending it is that you mention listening to a lot of bass-oriented music. With the PX, or any other more neutrally tuned headphone (i think this is the tuning of the EDC3 as well), you might be disappointed if you're not used to the flatter sound. Just a heads up on that. But if you want to go clean, clear, and flat, the PX is great.
If you want a more "lively" tuning, the 1More Triple Driver that's currently up on MD is a great option at $75. You could go cheaper and find the Klipsch R6 series, which are often findable at great discounts ($50 or less). Very nice bass-oriented IEM.
If you want to stay with a flatter tuning, The Klipsch X11 is a great option as well that you can often find in the $70-ish range. While I love the PX, it's an "at home" IEM, because of the relatively unwieldy size. The X11 is tiny, and is my favorite go-anywhere option.
I haven't heard any Beats IEMs, but have heard many of their over-ears. If the IEMs are similar quality, any of the options you get advice on here are likely to be a better way to spend your money. Enjoy!