I wouldn't change those at all, those are great tires. If you are commuting, chances are they are gonna take some hard hits, like metal and glass. Not always the best to put on brand spanking new tires just to abuse them like that. If they have a really good deal at BGI on tires you 'might' want to invest in a replacement set but again you may want to see how you like commuting first? The grip on the edges of your tires I think you'll really appreciate and you can take it down the towpath and really blow through it fast (which is fun ).

One other thing I just thought of though, if you do end up using the Towpath consistently get into the habit of getting that grit out of your gears when you get home. It will eat up your drivetrain if you don't clean it. Ask the guys in service at BGI how they know when someone commutes on the Towpath, they will likely grin from ear to ear.