NO! Why should you arbalesters get special treatment? I pay like 865gp every second round for my greatsword + armor.
Not to mention arbalests and heavy crossbows are ment to be carried while the user wears light armor. So if you are playing the cbow class correct, the highdamage cbow is really the only thing that should cost anything(also the tiny melee weapon if you have one). And I was an arbalester entire generation, so I somewhat know what im talking about. The upkeep sucked and hurt my heart, but I admit that it balanced the books. Basically same point as Peasant_Woman had.