The TRD coilovers are REALLY that stiff. TRD coilovers are tuned for (semi-)racing, and then you require stiff...
The Sportivo are a total different kind of driving experience ...
It will be easier to replace all the Toyota emblems (on a Tez) then to do an engine swap. Lots of parts need to be replaced as well, for instance the transmission is different too.
So ... GET a TEZ ...
Note... Mintex M1144 are a special compound (higher friction) and come in a blue box. I doubt that most of you have used it before in a Lexus, since it does not come with an e-mark. M1144 compound are comparable to the Ferodo DS2500 compound and have a significantly better stopping power compared to the EBC Greenstuff.
The Mintex pads that most of you have ... are the Redbox compound, which provide a bit better stopping power compared to stock, but are priced similar (or even cheaper) than the stock pads.