M737 is just dandy.
Sram PC58 is good on anything 8 speed though shimano IG is smoother.
I use Sram PC58 with M900 XTR over M737 8sp with DX thumbs just fine.
IG50 over Sachs Maillard 12 21 8sp with Campag mechs and Ultegra down tube shifters. Also fine.
It's down to weather you like black links or not! I don't off road.
Somerset, like 'Heartbeat' with newer cars!
Retro MTB: 1992 Cannondale M1000 Deore XT M730. 1992 Raleigh Dyna Tech Quantum Deore XT.
Retro Road: 1992 Eddy Merckx Corsa Extra Telekom Shimano 600 STI. 1993 Dyna Tech Ti Campagnolo Athena 8 Ergopower.
Modern: 2004 Wilier scandium Ultegra 6600. 2014 Wilier GTR Ultegra 6800.