I use this one!

Thanks for the response.

I ended up doing a lot more searching and detail skimming and found this one.

Looks to produce bands 2/4/5/12/13/17/25 which would hopefully cover all the bases for signal strength and signal speed since reviews say that both strength and speed increased.

And personally, for each hotspot, I don't need much. At least 5-10Mbps speed would be more than enough for what I'm doing.