Get the EsseEsse upgrade....Nicer wheels, sits lower and you'll have 160 ponies under the bonnet. If you can afford, it's a no brainer IMHO. I ordered an EsseEsse last week, picking it up on Friday. Drove both back to back and I was sold immediately. And, remember if you buy the EsseEsse, all the old bits are returned to you in a nice crate, which you can always sell to recoup some of the 2.5K outlay. One other thing, have you considered the monza exhaust??? My dealer made me an offer I just couldn't refuse - 3K for the KIT and Exhaust :-)