Can anyone recommend a good aftermarket navigation system?

I'm looking at the Magellan Roadmate 700, but any info is appreciated.

Thanks in advance.

 

There is a new Garmin, the 2620 i believe that's plug and play and i've read the reviews and it is very good. Internet pricing is around $900 or so. I'm considering that because i can use it in any car.

 

Pioneer AVIC-N1 CD/DVD/NAV... All for around $1200



# TFT active-matrix LCD monitor
# Motorized 6.5" touch-screen
# 4 x 22 watts RMS
# 4 x 50 peak power
# 12 million points of interest
# 64MB internal memory
# 2 DVD maps
# GPS antenna
# XM Satellite Radio rady
# Widescreen Modes
# TV Tuner Controls
# High-pass Filter
# Voice Operation with optional microphone kit (CDVC1)
# CD Text Display
# 3 sets of preamp outputs
# 3 zone capable
# Cellular phone Mute
# Audio/video input
# Audio/video output
# Rear camera input