Since I believe you have 2 Sterns & a MM (or 3 Sterns) I would say DI for some variety.
Although I have DI & SW and they are both a ton of fun.
EDIT: Probably be more fun for the kids too

Good job, it's a fun one. Go into the adjustments and deal with the right scoop if you have to...it can be a little too powerful.

I get a little sick of hearing this because it immediately infers the game cannot be fun or long lasting if you're juts playing the modes; which isn't true.

Sure I hear ya; Not an easy choice when you can't play them. Luckily I own both (Pro SW) and I can tell you they are both very fun games. At some point you just gotta pull the trigger and get stuck with one!

Don"t worry I down vote a lot.

With kids involved DI is the easy choice. My daughter is only 19 months and she goes apeshit for DI. Crawls all over the glass like a maniac; they'll love it.
Best read up those DI threads because the thing has some issues usually fresh out of the box.
Enjoy!

Whilst sometimes true with Stern, SW is way past 50%