Watch out that you get the correct countersink angle screws - it's not the same as the one used on losi cars...
The RC10 uses aircraft-spec shallow countersinks, so normal screws will stand proud and just not work.
I found an excellent supplier of appropriate screws a while ago, and they do small lots no problem with a pretty low mimimum order.
Go ahead and go for stainless!
The link and some other info's in this old thread.
http://www.oople.com/forums/showthread.php?t=49572
Cheers!
Ty