I'm from the MultiTrackStudio camp as well. It's by far the easiest to use, and never a hickup. The new touchscreen features in version 6 and the multichannel inputs are neat. I must agree with robh though, get into one and stick with it because even the most simple programs can get fantastic results nowadays. The early Beatles stuff etc was done on four track.
Not being a computer expert stability is the keyword for me, and as far as I can tell the PGmusic stuff is also very stable. I haven't tried Realband for doing any recording as such, I guess it's what you're used to. Realband and BIAB however do seem to have what is probably the closest thing to a "talent" function


Chris