So my band is about to start really giging out I think and I need a rack for my 400+. I don't really want to set it on my cab, so something with castors would be prefereble. Would it be in my best interest to buy a shock rack, they are damn spendy. I see a lot of fellas who seem perfectly fine with putting their all-tube amps in standard racks. What do you all think? Is it really going to hurt my amp to not have a shock rack? THanks.