Hello everyone:
Im new to AVIC411 and wanted some unbiased opinions on what f-series unit to install on my Saturn. I've heard mixed reviews on several of the units and my main purpose for one would be CD, IPod and navigation, every other addition to the unit would be a plus but not highly needed for me. I have narrowed it down to three models: f700bt, f900bt and the f90bt.
This would be my very first navigation system and my cross over into the car stereo world (since I dont tend to modify my factory installed stereos).
Though I am new to the stereo world, I am a huge "gadget" and "electronics" loving gal so I am looking for something thats functional, appealing, and fun to use.
Thanks in adavance for any input. 
~D
2008 Saturn Vue (Redline) and an F90BT owner here, so I can speak from personal experience on the F90BT. It feels right at home with my Vue, and I've had nothing but complements from its performance (since the 2.0 firmware) from anyone riding in the passenger seats. Start-up time is fine. When you have it on terrestrial radio/CD, playback is immediate. iPod/iPhone playback takes a 20-30 seconds, but is hardly noticeable (leave the VR catalog off after sync'ing your iPod library once and it'll shave off response time significantly). Bluetooth connection to my phone is quick (under a minute), and maps appear within 40 seconds or less.
I'd go with the F90BT again seeing as how it's their premium line and can do DVD playback as well as iPod/iPhone video playback (and comes with the proper cable to do so). It works fine with both iPhone 2G/3G, although you need an aftermarket dongle to charge the 3G properly. I use it with my iPod Classic 160Gig though, and only sparingly charge my 3G iPhone when in a crunch.
Bluetooth works like a charm with it, as well. I mounted my mic on the steering column and have it pointed at my face's direction. Sound quality is good. The GPS antennae is mounted under the dash for a complete factory look. I always have a strong signal in the metro-Detroit-suburbs and northern Michigan area.
Frankly I couldn't imagine having any other head unit in my Vue; it's simply a match made in heaven. I'd be happy to post some pic's/video if you're interested.
Cheers!