If you really just care about looks, go to the eibach catalog and buy slightly shorter springs. You'll give up some travel, but the cost will be very small ($80 per spring). If, down the road, you want that travel back, go to a reputable Bilstein rebuilder and have the shock rods shortened.
There is nothing exotic about the basic suspension layout of the evora: unequal length a-arm, eibach coil springs, bilstein gas shocks. It's the simplest, cheapest design that works really really well. While I don't particularly like bilstein, I acknowledge that they are the shock world's performance bargain of the century. Compare the prices of them to Koni 28, Penske 8xxx, and the like. If you don't like the stock valving, its dead easy for a shock shop to revalve them to your specs. Don't know what specs are for you, make friends with a race engineer.
It's important to note, that the evora (along with every modern lotus) was designed with few performance compromises in the suspension. You're not going to get huge gains just from increasing the springrate and slightly altering the geometry like you would in a car with Mcpherson (or Chapman) Struts.
EDIT: The obvious exception, of course, is track use with very sticky tires. You probably do want considerably more springrate, but that's not the street.