For a sprint race option look at Caterham R300, going to be very good grids next year and the cars are quick, fun to drive and very reliable with the new Sequential gearbox.
We have a new car for arrive and drive rental being delivered in January. Calendar is looking very good with 2 British GT support races at Silverstone GP and Brands GP and a European round at Zandvoort.
Contact me if interested
Have a look at
www.spy-motorsport.co.uk
http://uk.caterhamcars.com/motorsport/superlight
My website is currently being updated but should be up and running again tomorrow