Full Sink, Sink Tip or Depth Charge

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So I was at Cabelas yesterday Oh FYI they have a bunch of Fly rods on sale in store don't know if they were returns or what but I seen a Sage VXP for 5wt 225 and a bunch of TFO rods for really cheap.

So now I need fly line, been surfing the web for line and well what works best for Stillwater or Lakes. I know Sinktip if more for rivers but what are you opinions on Full Sink V or Depth Charge line does one work better ?
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