I have decided to buy the Roland 2400 unless I can come up with more cash for the 2480. I also want to buy a few different preamps to use with it since I know the quality of the pres on the Roland are just OK. I already have a UA Solo 610, I am also looking at the P Solo and even the GT Brick. I want to hook them up more as a line DI into the the Roland pre with a XLR cable. Is this the correct way to do this? The reason I want to buy a few different types is to get different flavors. I really believe getting the correct sound/tone I want before I record anything is the way to go. I don't believe in the concept of fixing it in the mix. I don't think there is a way to bypass the Roland pre and there is no insert in the 2400. Since these are more of just a simple DI type preamp and do not have tone shaping or compression, going into the mic XLR seemed to be the best choice or would the TRS 1/4" input be better? I am trying to get the best possible tone/sound to 2400 from the beginning of the singal chain.