I've got two SSDs in my lappy and, so far, so good. There will be many here that will advise against a single drive, but, at the end of the day, the decision is yours.
My two SSD setup is pretty damned fast, at boot up and when reading wave files in Sonar. I've never pushed the disk activity beyond 5% with my smaller ten audio track projects.
Oh, and anyway, if you think it isn't performing as it should, you can always get another SSD or HDD