ahh yes, 25mm, not 27. sorry. to some extent I am unsure on how to apply the rates to the LGT. I understand higher rate, more resistance to compression, but not how much more firmness will be applied by X number of spring rate. and nobody I know has a LGT that is modified. only WRX I know has some tein S techs on stock AGX struts, so hard to get a good correlation.
with the koni, I'd imagine the dampening is more than enough for either one. regarding the epic, I do hear that they are not much more stiff than stock, which lead me to lean towards the rallitek. but I just dunno, since the rallitek seems to be the highest rate of springs on the market....