JMHO...
New tires are always better than old ones... (old tires suck!)...
After 50 miles, (to wear off the mold release) new tires will have more stick'em and a better profile... and they will feel better..
I like the look of Shinko's.... and they are a lightweight tire...
Any new tire will perform better than an old one....
Shinko's are a good tire... as are many others...
If you ride a lot of miles per year,... you might want to pay more for a mileage tire... They will gain mileage in one of two ways...
Harder compound (less traction)... or deeper tread (more weight)...
If you ride enough to accept the trade-offs, you should buy a higher mileage tire...
There is no right or wrong,... just weighing of the positives and negatives based on your riding style...
If you ride lots'a miles down straight highway... you want a mileage tire...
If you ride when you can,... and you don't chalk up 10k miles a year...
go cheaper...
Cheng Shin is about as cheap as you can go...
And they are still good tires...
They will balance easier than any other brand... and that's because they they have less rubber than most...
They won't last too many miles.... but that's okay, if you don't ride much...
You want to buy the best tire for for you... and how much you ride, and how hard you ride...
Try to buy a tire that you will wear out in 4 to 6 years...
Less if you ride hard,..more if you ride easy...
I like Shinko's because they suit my riding...
Not a whole lot, but brisk...
Shinko, bought out Yokohama,.. and uses their racing profile molds...
Good tires, with a nice tread, for a reasonable price...
Other tires will give more miles,... or better performance...
At a price of weight, stick, mileage, etc...
All tires made today,.. are pretty darn good...
You choose the the one's that you will use up to the wear bars in 4 to 5 years... if you buy too much,.. you waste your money, and will end up riding dry dead tires with no traction left... if you under spend, they will be bald and still fresh...
If you are new to riding, and don't know how much you'll ride... go cheaper...
You can't go wrong with fresh tread...
... and buy the ones you think are pretty... ('cause you will live with them for 4 to 5 years)...
...
All that said,... I like my Shinko 712... medium wear, light weight, and good stick,.. pretty profile...
I'm guessing 12k in 4 years... at 3 or 4 k miles per year... ( and that's just a guess... )...