A German 8-wheeler (50mm L60, or multiple turret choices) or a British 4-wheeler like the Daimler (2 pounder with LittleJohn). One difference over the current M8 would be an armored top, so it couldn't be easily strafed.
MH
I fully support adding in the German SdKfx 234/2 "Puma" with the 50mm KwK 39 L/60 cannon. Top speed of 50 mph, 30mm armor up front and 8mm on sides, a 2.4X main gun sight (same as Pzr IV), 55 rounds of ammo, 1 MG coaxial, and a main gun AP ability of 44mm at 1000 yards. Not a bad gig, really.
The same goes for adding in the British Diamler AC Mk I armed with the 40mm (40mm Q.F. 2 Pounder Mk.X L/50), Top speed of 50 mph, 14mm up front with 10mm on sides, a 1.9X main gun sight, 52 rounds of main gun ammo, 2 MG's for support (pintle and coaxial), and a main gun AP ability of 35mm at 1000 yards (or 44mm at 1000 yd with Little John squeeze bore adapter). Not a bad gid either, offers everything the Greyhound does but smaller target, a better turn radius, slightly better armor, and slightly better ability to shrug off aircraft strafing attacks.
