Getting XM when my Kenwood deck is Sirrius

[Magic34]

I have a Kenwood headunit on my boat with Sirrius but I have XM in my vehicles. I would like to run XM on the boat and keep my current head unit. I have 2 wired remotes on the boat and it would be a beeyach to have new ones put it.
What is the best was to add XM and keep the current headunit?

[It's all Good]

XM Direct (http://www.xmradio.com/xm-direct/index.xmc) for Kenwood
XM direct 2 (http://www.xmradio.com/xmdirect2/index.xmc) for Kenwood