I've tried similar scenario yesterday, with three parts of the last few minutes of Tchaikovsky's 1812 ouverture (the noisy part wwith real cannon shots, church bells etc). I used EAC to rip specifying exact start/stop frames (perhaps cutting a single wav file is a better idea). I listened only on empeg: independetly lame-encoded VBR files produce quite pronounced transitions. Original wavs and --nogap encoded CBRs are noticably better, but still not there by far. I expected better results, at least with uncompressed files (I will have to check them with WinAmp nogap plugin to rule out ripping error, though). That said, one is unlikely to notice transitions in a normal in-car listening environment without actually looking for them.