the gs9s aren't all that. you can't really pull back because they're a platform pedal and your foot will slip out. I have sylvans (double straps) with the aforementioned onisomethingoranother tiger shoes...they're starting to get eaten (don't reccomend). the reason sylvans have the rear cage is for old cycling shoes. it doesn't clip into the pedal like the new systems do, but they have a super stiff sole and a cleat with a slot for the rear cage. that way, you can use clips and straps pretty much just as effectively as clipless, but they're slippery as hell and crappy for walking in. i damn near busted my **** when i tried to wear them for work one day. (i rethought that idea very quickly). but yeah, it's pretty much either comfort, style and walkability or performance. if you want the first three, deal with clips and straps. if you want performance, go clipless.

the end
-jason