What valve springs for my combo?

I still have the stock springs on my low mile gt40ps but i dont think their up to the task so Im wondering what will work best for my combo.
Heres my combo, just looking for some cheap springs that are half way decent so i dont float the valves.
308 with deeper valve reliefs
gt40p heads milled .020 stock valves
trickflow stage one cam.
Im looking to use the full potential of this cam with these heads and want to be able to use the whole rpm range of it. Thanks in advance.
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THe car is running. Have 2,000 miles on it already, but I want to be on the safe side and get some new springs.