Q's about the Align 600XL motor

[What's_nitro?]

I just bought one on eBay yesterday for the Rustler. I was planning on running 6s LiPo since that's what it's rated for. Any chance it could handle 8s without destroying itself? I ask because 6s would require buying new batteries. Either way I need to buy an ESC. I have my two MaxAmps 4s 4Ah here already so I'd like to use them if possible. What is the RPM limit on the 600XL? I can't seem to find it anywhere... The speed on 8s would be just shy of 50k RPM. What do you guys recommend?