protools is the industry standard like a shure 57 is, is it good sure, but is it the best, not really. i have to use protools at school but i use sonar at home. the biggest reason i would see myself using protools is because of compatibility with other studios(although i know sonar shares a save format with protools that normally integrates between the two pretty well). but i find protools, especially le very, limiting and thats why i would use something sonar or in your case cubase. the track limit can especially be a problem when i find myself using alot of mics on just one or two amps at once, after a couple parts are recorded the tracks add up really fast.