First of all I fish for smallies only on Lake of the Woods so that may influence my tube selection.
I'm a huge fan of tubes and typically use a 4" tube (not a finesse tube) with a jig head inserted inside the tube. My finesse tube was the Canyon Plastics Garlands original Gitzit.
More recently at tube made by River Rock Custom Baits may become my favorite smallie tube as it is just a little larger than the Garland tube and it is super soft. It is large enough so that a Yamamoto lead weight can be inserted inside the tube. I do that when I want more snagless bait and either texpose the hook or let the hook float inside the tube.
The tube on the top is a typical 4" tube, the one in the center is the R.R. tube and the bottom one is the Garland tube.