I'm looking for an open pair of headphones great for movies and games. And also if possible I prefer if it has very good to stellar female vocals.
thank you all help is appreciated

Consider:
HIfiman HE-400 (find a sale or used)
Hifiman HE-300
Beyer DT880
Beyer DT990
Sennheiser HD600 (used, or sale)
Ultrasone HFI 2400
Ultrasone PRO 2500
AudioTechnica AD900X
Very best,
Heya,
The E10 is fine for up to 300ohms roughly. In an ideal world, you would want more power, but honestly, they matched nicely with the Fiio.
Very best,
Heya,
The HD600 has a slight sparkle in treble, but it's not overly bright, nicely balanced. The HFI2400 is slightly brighter. Mids are better on the HD600. It's better for female vocals really. The DT880 is excellent too. I would get the 250ohm.
Very best,
All of them are vast upgrades over the M50.
I would get the DT880 over the HFI2400 in almost all cases. However, if it's a huge price difference, it's hard to say. The HFI2400 is a good headphone. I like the DT880 better in every way. The DT880 PRO (250ohm) is about $240 on Amazon and the HFI2400 is about $180. I would pay the extra $60 without even thinking about it. But that's simply my preference. I find Ultrasones to have a metallic/cold signature to them that is great for electronic, but not so great for natural sounding recordings. The DT880 and HD600 have a more natural sound. And of the two, I prefer the DT880 more, simply because it has a little more edge in the treble which I adore.
Very best,

That's up to you. I buy used all the time from warhouse on Amazon, it's great.
PRO and Premium are the same; the headband is different, it clamps a bit more on PRO series. If you want a tight fit, go PRO. If you want a looser fit, go Premium.
Very best,
That's a very fair price. Used ones typically go for $200ish here in the for sale forums. Getting a used one from Amazon for that with a return policy is a good thing.
Very best,
They are fantastic on the Fiio E10. It's a warm, darkish amp. So the treble is great, not overly bright, but not dull. Great mids. Bass is good, very good. The nice thing about the combination aside from excellent performance per price ratio, is that you can go from a warm neutral headphone to a bassy monster with the flick of a switch on the E10. That +3 db hard bass boost that it applies when you do that makes the DT880 rumble in a wonderful way for when you want to get bassy for fun. And right back to warm neutral when you're not wanting that by turning it back off. Great setup that "does it all" for an all around ability to have the neutral headphone and the fun headphone all in one set, since the E10 can let you go both directions.
Very best,