Well, not sure I've seen the power range Tasco you've mentioned, but one of our more respected range members when it comes accurate rifles, reloading and just downright great shooting ability has a number of old Japanese higher power Tasco scopes on his rifles. Everytime I ask him about a Tasco, he'd bought it used off a dealers table in some gunshow.
Lets just say, he has nothing bad to say about them. Mind you, he does own some beter brand scopes that cost a heck of a lot more.
As for me, do own a couple of old Japanese made Tasco 3-9 scopes that were on some old used rifles I'd bought at a pawn shop. Nice optics in them and they still hold zero.