Performance parts... To buy or not to buy?

[Cleveland]

I am buying an off the lot 2011 LE HB when I get back in May (construction project in Haiti) so I am looking for some input prior to making a couple decisions.

I have been driving a Del Sol Si previous to this and obviously feel like I’m sitting up in an SUV at stock ride height. What are the opinions on the TRD spring kits? These would solely be for aesthetics and not be supplemented with a change in struts. Previous readings have warned against undue fatigue of the struts and a harsh ride. The photos of lowered HB’s with rims look phenomenal, however I don’t believe it’s worth a reduced ride quality or wrecking parts should that be the reality.

The short shifter kit appears to be consistently favourably reviewed. Again comparing to my current car I find the Yaris’ throws noticeably longer and a bit sloppier. For those with the kits installed, what is your opinion of the long term performance? Would you recommend the system as a generality?

Tips regarding any facet of the car would be greatly appreciated, acknowledging that this is a 1.5L and in no way to be confused with a race car... lol