I'd rather have a few sets of the Astro Nano stuff.
I took me awhile to figure out just why the Nano stuff works so well and why it’s almost always my first choice. But I think I had a bit of an epiphany.
Astro realized that almost every common fastener a mechanic will see is a capscrew in a blind hole. Very, very few nuts on very long studs or bolts are used such were you need a very deep socket to reach down the length of threads to grab the hex.
What this means is that a very shallow socket that’s just deep enough to handle the head of a common hex head is quite sufficient.
And not only does the shallow/short socket fit where other sockets won’t, it is much less likely to come off the fastener under torque loads. Deep sockets move the torque apply distance farther above the plane of the head head and this caused your applied torque to want to pop the tool off the head. The deeper the socket, the worst this is.
At the other extreme, you have something like a box end that applies the torque exactly in the center of the hex itself, so it’s going to stay on the hex.
The shallow Nano sockets just work brilliantly in the real world. Grab a 22mm ratching XL box wrench and you can use the 1/2” drive Nanos almost like you’d use the 3/8 Nanos with the Astro 78318 ratching wrench (17mm). I see they’ve added the 78218 for the larger 22mm hexes now, so that’s a great option.
I do wish they made an “oops I shoulda bought the larger set” completion set that lets you buy the 20-24mm sizes in case (like me) you made a mistake and bought the 3/8 set that stops at 19mm.
. You can now get the I-beam design in other brands like takagi or DCM. I love in Japan and now see all the rebranded stuff 
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