z610i (almost same as k610i, just a flip version and OLED display)
+ OLED display
+ A2DP stereo bluetooth
+ eACC files support
+ 3G
- No FM
- new m2 memory slot (smaller but expensive)
- only 16mb internal phone memory + 64mb m2 card
- no autofocus (not a big con but still)
w810i
+ 2MP with Autofocus
+ Megabass
+ HPM-70 bundled
+ 20MB int + 512MB card included
+ there also an offer here you get a pair of speakers free with it.
Cons for both the SE's is the video quality @172x144. You could streach a little and get the n70, if you are lookin for nokia's
Nokia N70
+ Larger Display
+ Video recording quality (CIF)
- Slower UI
- Slightly larger (being s60)