New Tire question

[ttikalsky]

First question what is "powder balancing" tires and is this good or
bad for the steer tires?

Second question, anyone have experience with "LongMarch" or "Yokohama"
tires?

I need two steer tires and the prices I have found locally so far are
:

Mich XZE : 360 + 60 mount/balance
XZA2 : 399 + 60 mount/balance
XZA3 : 480 + 60 mount/balance

Bridgestone R250 : 300 + 60 mount/balance
R293 : 375 + 60 mount/balance

Continental HSL : 330 + 60 mount/balance

BF ST234 : 300 + 60 mount/balance
ST230 : 360 + 60 mount/balance

GoodYear G149 : 375 + 60 mount/balance

Yoko RY023 : 281 + 30 mount/balance (powder)
RY567 : 309 + 30 mount/balance (powder)

LongMarch ??? : 238 + 30 mount/balance (powder)