Finale is indeed a good piece of software - I'm a regular user.
Yet worth bearing in mind that both Finale & Sibelius permit the user to write non-existent notes for instruments - ie, which go off the range of the actual physical instrument... without warning the user of this.
Of course, with some woodwind instruments, the lower limit is often being extended by new technologies and keywork, and the upper limit is often more a constraint of tone-quality and player ability. But it should not be possible to write notes lower than C for the viola*, should it? Or at least, not without a warning ;)
Bearing in mind how obsessive Finale's online warnings are in other areas of usage (!), this seems quite an omission?
I've not used Sibelius much, so I can't comment on its functionality.
* I agree, certain modern electric violas can be fitted with a fifth, low-F string. I've tried one, once. But this is a tiny number of cases - most five-string electric violas have a "violin e-string" as the fifth string, although it's quite unresponsive to play on it.