The Enve bar tape – 3mm – gets very good reviews, but at £35 a roll, it ought to. I have some really nice feeling Fizik Bond Cush soft? or something or other on my road bike, which I mostly bought because I liiked the Prussian blue colour, but has been good so far, but hasn’t done a load of miles, so hard to say on the durability front. It doesn’t like getting wet though, just seems to soak up water, which is good as it puts me off wet weather road riding 😉
On the knackered cross bike I use Supacaz but with Fizik gel strips underneath and that works fine and lasts about 50 times longer than the Lizard Skins stuff that seems to wear out in seconds despite feeling good initially. The gel things work pretty well ime and mean you don’t have to run super thick bar tape for a comfortable ride, ymmv.
No idea on the Silca tape. Everything they make seems to carry some sort of premium brand tax, which means it had better be very, very good.