Avant Slot - how do they compare?

In my brief and limited experience NSR & Slot.It seem to be the speed demon's weapon of choice and they seem to feature as the top two in inter-marque challenges.

I have only recently become aware of Avant Slot and was wondering if anybody can tell me how the Avant LMP cars stack up against similar cars from NSR & Slot.It.

How do they compare on fast routed tracks and how do they compare on twisty plastic circuits?

The reason I ask is that I have an opportunity to buy the Avant 2006 Le Mans winners set consisting of 2 Audis (the TDi's) and the Pescarola that split them at the finish. Brand new - £68 all in. I'm hoping they will be up there with my Slot.It Group C cars.

Or should I spend the same cash on just one NSR? (Don't own any NSR's at the moment).

Does anybody have first hand experience of how the marques stack up?

Thanks