I bought an SVT 3 Pro (2 rack spaces) a while ago and always planned to buy a rack case but, I havent yet. The thing is I am playing out more and recently got a BBE ' 383 bass pre amp (one rack space) that I will not leave the house without (compressors should be a part of every bassists day to day). I also eventually plan to get a power conditioner(one rack space). I have pretty much decided on which rack case to buy,SKB SKB-RLX Roll-X Rack Case with Wheels. I need the wheels because my back is messed up. There is a 10 dollar difference between the 4 space and the 6 space. Should I: a) I should buy the 4 space, duh, thats what you need. Don't waste money on extra crap! b) Should I invest the extra 10$ into the assumption that eventually I will get more or bigger stuff and will I have a sudden urge to buy more rack mountable stuff now that I have the opportunity? Thank you!