RegEx in sed

[pqwoerituytrueiwoq]

In Javascript i would do it like this

'model name : AMD Phenom(tm) II X4 965 Processor'.replace(/(^.*: | [Pp]rocessor|\([Tt][Mm]\))/g,'')
but sed's RegEx does not work the same, so i have been doing it with separate RegEx like this

cat /proc/cpuinfo |grep 'model name'|head -1|sed 's/^.*: //g;s/ [Pp]rocessor//;s/(\([Tt][Mm]\))//'
is there a more efficient way to write the sed part like i did in Javascript?

[Vaphell]

$ sed -rn '/model name/ { s/^.*:\s*|\([tT][mM]\)|\s*[pP]rocessor//gp; q}' /proc/cpuinfo
AMD Phenom II X4 955

[pqwoerituytrueiwoq]

thanks