I had f+r ARBs in my '03 Tundra. Loved them. If you can afford it, and want an on-board compressor anyway, it's the way to go. I used the lockers quite a bit, but the compressor saw the most use. I would start with ARB in the rear, and then add front when or if you find the need for it.
'99 UZJ100 Land Cruiser Locked with OME and BFG.
'94 Santa Monica Airlines 39" longboard, Indy 159s, Powell AT wheels
'14 Dodge 3500 6.7, 68RFE, Thurens, 5100s, 295/70-18 ST Maxxxxxs
'07 Adventurer 10T with surfboard racks!
'74 Airstream International 29'