i dont think thats a fair argument man. on vinyl you can find the part of track you wanted to cue up just like you can with the cdj's. Beatlock takes away the key fundamental of the DJ, beat matching. agreed with the loop buttons, but i rarely ever see them used. we could argue on this topic all day constantly highlighting flaws in each others arguments, but that wouold bve stupid as it wouldnt prove or change anything, and its not what this thread is about. ontopic, with the 400's effects, tbh i almost never use them what so ever, the built in effects on cdj's are ussualy pretty shitty, its the efects you get on your mixers that are of use of external effect units. shouldnt be to much of a hard choice, both are equal as good cept one is a little newer. they will both get the job done for you, i may lean toward the 350's though due to what djaz said about the pitch control being better, as for the USB's 400's have USB connections as well. at least mine do