Mobo burnt, which alternative?

Hello. Im in a bit of a predictement. Allow me to explain.

My PSU, a corsair hx750w, burnt after a year. Since my pc was still within the store's warranty I sent it back to have it tested and the psu replaced. After replacing the psu for a corsair ax750w the store kept testing my setup during the weekend, which was when the mobo broke. Now I was asked if I wanted a different mobo to replace my old one within the same price range and this is why I am here to ask you guys for suggestions for a mobo with the same specifications than my own or maybe one slightly better within the price range.

My setup is:

Cpu i7 860
Mobo Asus p7p55d-e pro
4gb gskill pc16000 ripjaws cl9
2 1tb hd
Gtx470x
Corsair ax750w
Dvd rw

Thanks