Using Professional Monitors (Audio) with a 24" iMac

I would like to use a pair of high quality professional audio monitors with my iMac for listening to music at my office. I'm wondering if the analog audio output from the iMac is up to the task or if I should find some way to use the 5.1 DTS digital output and convert that signal to standard audio 2-channel SPDIF (I have a DA converter I could use) before sending the signal to the monitors.
Any advice?

Thanks for the information. One concern I have is that the studio audio monitors I will be using, which are active, are designed to receive a professional balanced +4 dBu line level signal. I doubt the analog output of the iMac is at that level. It is certainly not a balanced signal. Hence, I fear I may experience a signal to noise ratio that is not quite optimum. I can certainly give it a try, given that it will only require some cable adaptors and patching.
I am interested in the digital output of the iMac. I do not understand what Apple means when it states that the Toslink digital output is 5.1 DTS using SPDIF. To my understanding, SPDIF is as 2 channel format, capable of a variety of bit depth/sample rate settings (ranging between 16 bit/44.1 Hz to 24 bit/96k Hz) and is essentially an unbalanced version of the balanced AES3 (AES/EBU) format.
I have a rather nice Lucid DA 2496 digital to analog converter that accepts the standard 2 channel SPDIF and outputs a healthy +4 dBu balanced analog signal - which is exactly what my Quested F11 active audio monitors expect.
Any advive on these issues?

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