i think this thread pops up every month, do a search.
i have a logitech headset with a RRP of £140 which i got when they were handing out 10-50% vouchers randomly, luckily i got a 40% voucher which brought the price down to by a lot since it was already slightly discounted from £140, i think i ended up paying £60 ish for it.
every single person who has heard me talk has mentioned that the quality of my mic is amazing. so you could maybe look at cheaper logitech headsets, turtle beaches or one of those mix-amp setup things. like i say search for other threads about headsets, there are many with similar budgets.