Definitely get out and take a look at it in real life. AMOLED is just a class in itself for color saturation and black levels. It would never replace a n900 for me (no keyboard, no linux).

make me a N901 = 50+ keys, 800x480 AMOLED with resisitive screen (or capacitive stylus), dual-core Cortex A9, a couple of microsd slots, hdmi out, 720p hw playback and open dsp-based sound backend (edit) and 2400mAh battery...