SE just runs symbian UIQ ... which well , is now extinct ... cos UIQ filed for bankruptsy ... so no point going in for the w960 ...cos it'll be unlikely for any new apps to be developed for tat platform ... i don think there are any other walkman symbians ... however , u can get a popular model like the w580 or w910 and customize it using patches and elves to get a symbian like feel ... but tats not real symbian experience ...
if u don mind other brands , may i recommend some good music symbians
10k - 5320 xpress music
12k - i450 samsung
19k - 5800/n79