you may try 6630(good speed but no FM), 3230(remember its damn slow but it has FM ). they have more features than 6670.
6630 is around 11.2k, and 3230 is around 9.4k, 6131 is 12k, 6125= 10.5k
Smasung X700 is also a good set, and my friends who uses Samsung has no problem with it, but it's not SYMBIAN.
And for SE , try K750i........All features of x700, with a 2MP cam......