maz, the mod that you are looking for your ride is to know whats your desire out take.
meaning performance vs fuel economy...etc
i wont go into Apexi Neo, Emanage or Unichip as eventually if you seek more "fun" for the car, then i would sugggest the line of mods.
>suspention + anti roll + braces will notch it higher up & thus gives you the road confidence.
> if you want to remain NA, a aftermarket manifold will free the restricted horses.
MR-S for what is reknowned for is it unique handling & i would normally suggest owners to extract more by improving it to "closer to" "elise-like". now i know many lotus fans will "ketuk" me for even mentioning the MRS in same breath as elise but granted, if you put the elise is one end of the spectrum (more track like) on 9pts on handling, the stock MRS is 6pts. Improve on "its" (MRS) core assets & trust me you will not regret.
with the above swaps, in my autocross experience (& with good selection of tires) you "could keep" be within even turbo class timings. but of course the driver must have the discipline.
however those mods to me is more bang-for-buck than well say piggy backs. (not taking anything away from piggy backs as they will do just find for road cars). Is just that because the MRS is made as such; even minor set up changes will have dramatic improvement on "road-feel".
TRD are pricer but there are alternatives. sometimes some owners prefer convenience (as TRD is represented here to say CUSCO) etc.
but if your idea of a more bling outlook then performance ie appearence then by all means spend on car outlook. I know some owners feel it a waste of money to mod on performance. like i said it a matter of out take.
maz, ive pm'ed my mobile.
