agreed, budget please as well as what soundcard/amp/motherboard you have or if you are not opposed to purchasing a soundcard or amplifier. please also specify if you want closed or open cans and what kind of sound signature you like.
a few choices under $200
ad500x, ad700x, ad900x lineup. open. huge soundstage and great positional audio. lacks low end bass.
a500x, a700x, a900x. closed. similar to above lineup but with poorer soundstage and darker sound with a little more bass.
dt770. closed. bassy. decent soundstage for closed cans. v-shaped sound signature with bright treble and good bass.
dt990. open. bassy. good soundstage. v-shaped sound signature with bright treble and good bass.
dt880. semi-open. similar to above two but more neutral in signature.
k701, q701. compare to ad500x lineup but harder to drive.
hd518, hd558, hd598 lineup. open. fairly neutral headphones with more laid back easy listening feel.
some require amps or soundcards depending on what equipment you are trying to use them on.
for microphones here are a few options
lavalier microphones. may need adapter but offer everything from poor quality (zm1) to excellent quality (professional models). small, attached to collar or headphone cable.
moovmic or similar. low end copies of the modmic with worse sound quality and build quality. you get what you pay for but are not terrible for the price for low end budgets.
modmic. the go-to solution for adding a microphone to a headphone. good quality.
desktop microphones. on a budget the atr2500usb is similar to the much more expensive at2020usb but perhaps 75% as good in build quality and sound. the at2020usb is great for plug and play. the at2020 (xlr) is good if you use a mixer and want to record but is more equipment to set up. the at2035 is a slightly better mic than the 2020 depending on what you want to record. the blue yeti is a comparable mic to the 2020 which offers multiple pickup modes however it is a bit on the large size. usb mics will be plug and play and easy to use while xlr will need an adapter or mixer which can be better for recording since you have a physical knob to turn for gain and the like but may be more than just an average gamer wants.