New TC or gen1 TC (500gb) w/ Airport Express

Need some help guys and gals...

So my main goal is to have the best possible network performance with multiple networks in my house 1 for personal and 1 for work. I like the idea of the new TC since it can do multiple networks when the old one couldn't but I was told that I can accomplish this task with the addition of the Airport Express.

Is the new TC worth getting?

Thanks,

The TC is worthwhile if you need a wireless backup strategy, otherwise the extra expense might not be justified.