hi,
ok, just compared the different settings. my test track was "trinity dream" from the matrix reloaded score mainly because it's rather short (1:56) but not too short and because i just had it ripped on my hdd
on my setup, the pentagon with lfe sounded best to my ears. it has a wide sound stage and the bass is as good as i thought. although i could get my receiver to create an lfe out of the 5.0-signal, it wasn't as good as the dedicated lfe.
you're right about the surround-rig, but it's always better to hear it with your own ears. it sounded sort of compressed and too small to me (i can't really express it in english as it isn't my native language either).
so, in the future i will use the guide with my lfe-addition and be happy with the results
cu