Marzocchi 22 LO is 2460g, very heavy.
Rockshox Dart 3 coil, is 2260g with lockout
Rockshox Tora SL coil is 2160g with lockout
Rockshox Recon SL coil is 2000g with lockout
They are your choices if you're mainly on-road. You won't need travel adjust like the rockshox U-turn system (adds more weight) if you're just casual on-road and a little off-road on dirt roads (Rockshox Trail range Tora 289, 302, 318 have the u-turn travel adjust, 318 is popular)
Coil is set-and-forget. If you don't mind an air fork then you might consider going up to the Tora or Recon Race with motion control.
I'm just going on-road mainly so I will be getting the Tora SL or the Recon SL, with a firm spring, and with it set to 80mm travel, and as long as I have my lockout I'm happy.