If it were me, I'd use the R8202 on the outer curve, R609 on the middle and R607 on the inner curve. This might mean having to cut some short lengths of Flexible (or non-flexible track) to suit, or even use several R610s to bridge the gap, but cutting and shaping dead straight track would be very much preferable to cutting and shaping curved track.
Something you might also consider, if you have the room, is placing straight sections between the curved sections to reduce the visual effect of the reversing of the turn.