tagan 530w vs sharkoon rush power m 600w

[crni]

Hello
I have DFI ultra-d nf4,AMD Opteron 165 on 2900MHz, 4X1GBTeamExtrrem 266, ATI RadeonHD 5850, SBXfi, 2x hard disk.

I'm running my system on my 5 years old taganU15 530w.

Question : Only for this PSU

Is Sharkoon rush power m 600w good PSU. Will he do the job?
I can switch this two PSU from office?

What is better 5 years old tagan(if he is better) or 1 year old Sharkoon?

thanks for any answer.
Regards Dejan