It seems that it all depends on what you are looking for. Does Shimano make a triple in a crankset above Tiagra any more? I find the double to be simpler and with all of the new derailleurs covering 11x28 or 30 pretty much right out of the gate climbing is no longer that big of a problem. Plus if you ever go to SRAM or Electric shifting a double is about all you will be looking at.

To me Ultegra shifts a lot better than 105 and night and day better that Tiagra and Sora. But the only way you will ever know is to ride them back to back on roads you normally ride.