GTD apps reviewed?

Good evening everyone, I’m pretty new to GTD, switched to Mac about 8 months ago. I’m reading the book now and am interested to know if there’s a site that has reviewed most of the GTD apps out there. There seem to be a good handful of apps (OmniFocus, iGTD, MidnightBeep) and I’m having a REAL hard time trying to decide which might be best for me. Right now I use Remember the Milk on my iPhone (very nice!), but I find that most GTD apps sync to iCal (events and tasks), therefore I can’t see my tasks on the iPhone.

Any pointers, in general, of what apps are good and which to stay away from? Thanks in advance,

Marc