Need help to choose next guitar amp!?

Hi, I am looking for a new guitar amp. Im playing rock, metal or alternative ( metallica, pink floyd, tool etc..). My guitar is a LTD kh-ouija and I have a pedalboard too. I am looking for a good amp in the range of 300$ - 750$. I have a Roland cube 30 but he recently begin doing some crazy sounds.Can you guys give me some advice for the amp I should pick? Orange, Marshall, line-six, roland, vox and which model.