There are a number of good synthetics on the market, but they're typically not available as most auto parts locations. You can find "synthetic" brake fluids, but just be mindful of what you put in. This is the part of the VX that keeps you from hitting things you don't want to, so do the research.
Here's a great page from Pagasus Racing's web site that has a listing of all the synthetic fluids they carry along with a chart of their comparative properties: Brake Fluid Comparisons
I've liked the ATE Super Blue for it's affordable performance and good track record. Plus it's available in an alternate color, amber, so you can change colors at each flush to be sure you got all the old stuff out when using the MityVac bleeder. You've probably been using the Castrol LMA which is good, but wait 'til you see the Castrol SRF. At about $60 a liter it's about the best you can get! The highest wet/dry boiling point of all the synthetics by a good margin too.
As for the rotors, I don't know if you'e ordered or not but have you looked at Frozen Rotors? They've got a good following on the autocross circuit and are one of the more innovative braking products out there. Essentially, they're cryogenically treated which does some wonderful things for the material used in the rotor. This has in the past been a very expensive process, but like most things has come within the financial reach of the enthusiast. Tire Rack has pretty fair prices for the VX: PowerSlot Frozen Rotors for Isuzu VehiCROSS
I'll be looking around to check for better pricing as I've got to replace the rotors on the IronMan and this is what is on the top of the list, along with Axxis Ultimate brake pads. All the top competitors in our rallycross series have used the Axxis pads and they do the job on the street, in the sand, in the mud and in the gravel.
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