I would go with the wider tire, KONI suspension is always good, and i dont think a cone filter helps. Just changes sound IMO i didn't notice any power difference. I've never autoX'ed, so this is my unprofessional opinion. I'm sure someone else with way more knowledge about this will chime in....by the way, Welcome to Pelican forums, probably the most useful tool to owning a Porsche known to man
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'87 Guards Red 924S - First Porsche - SOLD 5/21/10
'67 Red VW Beetle - Restored by me and my dad, 2115cc motor.
'87 951 - Silver/blk, full leather interior - LR Chips - 3 bar FPR - LBE
'92 Ford F150 - Winter truck
'04 Yamaha R6