@OP, instead of just listening to others comments that symbian is slow, you better try it out yourself. The VFM that phones like C7 and C6-01 provides is very good. And S^3 is much much better. if I have to choose among Bada and Symbian, I would definitely pick Symbian as it's appstore is much better and factory loaded apps too are good. Also,Nokia is much much better than samsung when it comes to support and servicing.
Symbian^3 is definitely very usable (with quite a few good apps too), but with nokia itself planning to phase out Symbian very soon, support for these devices is questionable. Already the nokia forums for the C-series phones are filled with complaints, it is said that C-series doesn't receive the same level of support as E or N series phones.
Otherwise, C6-01 and C7-00 have EDOF fixed focus cameras. They also perform image processing to sharpen up the details. It's not so bad viewed normally but zoom it up a little and you will notice a good difference between real AF cameras in N8/Wave/others and what the EDOF cameras produce. Also, they are
horrible for taking close up shots.
C6-00, however, uses Symbian S60V5 and has a 5MP Autofocus camera, and it clicks some great pics. So that would be a good choice.
Anyway, all this is moot as the OP is already going for the Wave II.
@brijeshtr: AFAIK Bada supports Java version of Google Maps. There is also a version optimized for the Wave's display resolution available on some forums.
Galaxy SL has very slightly inferior (slower) hardware and plastic body compared to the Wave II. The flash makes a difference and if given a choice between having it or not, just get the one that has it. Wave II's flash is quite powerful too.
Plastic body may not be such a big deal, but on the Galaxy SL it is a fingerprint magnet. And trust me, if you're spending so much on a phone, the metal body makes a difference in the feel or the phone. Whether you like it or not is up to you, but I personally think a metal body really feels a lot better on the hand. Of course, Galaxy SL has a 4'' screen compared to the Wave II's 3.7'' screen.
I'd say go for the Galaxy SL if and only if you need android very badly.