WRS has Marchesini M10RS magnesium wheels at $3325.00Those are forged aluminum. Not magnesium. Forged mags are around $4-5k. Forged mags are lighter than forged aluminum. Forged aluminum wheels are about 18 lbs. If you think the stock V2 wheels are heavy, the stock 959 were anchors at 32.5 lbs for the set.
Also lighter wheels do affect suspension as it’s less unsprung weight and therefore moves faster and easier. It’ll affect compression and rebound. 1 lb/wheel maybe not but 3-5 would be significant.