i want to get 31"x10.5R15 BFG all terrain ko for my stock 1988 fj62. ntb wants $676 for 4 tires with taxes and all that. I can also get them online for $117 a tire or $468 for all 4 but you have to add on $80 for s/h and then $60 to install the tires which is roughly $608. the extra cost from ntb is $68 which is the cost for the lifetime wheel balance/tire service. Now do you think i should just go ahead and get the tires from ntb or should i buy them online?