R888s are perfectly fine driving to and from the track on.
I'm an RA1 fan, but you'd have to (try) and run 275 18" square.
Speaking of which, are you using stock wheels? Is that why you're going w/19s?
If it were me, I'd be buying 18" track wheels. Cheaper tires, less weight/rotational inertia, etc.
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'02 S54 M3 (500/500 GC/Koni)
'08 N54 135 (JB4, DCI, BMW PS/Bilstein B6s, H&R M3 FSB, Strongflex FCABs)
'14 N55 X1 (JB4, BMS DP, BMS Intake, Alpina TCU reflash, H&R Sports, Bilstein B6s, E93 M3 RSB, Strongflex FCABs, baby seat)
'08 N54 535xi touring (Bilstein B6s, Downpipes, MHD tune, baby seat)
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