I need to replace a preamp tube in my head, seems one of them is microphonic. I haven't purchased preamp tubes in about 10 years so I've no idea whats good these days. This will be for v1 in a Splawn quickrod. I use to buy my tubes from TheTubestore but I notice you can pick up pretty much all the same tubes at Amazon now a days, since I have a bunch of Amazon points I figured I would just purchased from there...any reason not to? Any suggestions would be much appreciated.