If you buy a decent enough PA speaker, then yeah, I would take a PA rig over a bass rig any day for my rig. A decent top will run as good, if not better than an equivalent bass cab. Of course, it all depends you having the preamp of your choice in between your bass and PA cab(s) to get what you want. A PA cab loaded with speakers with 4" voice coils. Yup. Yes please.
I've not got experience of the cab that you have posted... so in this particular instance, your mileage may vary.