Which do you reccomend? It doesn't have to be limited to those three, if you know of one around $300 that's better than those.
To go with this rig:
Processor: AMD Athlon 64 3700+ San Diego core
GPU: eVGA Geforce 7800GT
Mobo: Asus A8N-E
HD: WD Caviar 80GB SATA
Case/PSU: Antec Sonata II w/ 450w Smartpower Antec PSU
RAM: 512MB x2 Corsair ValueSelect PC 3200 (2 of these if I get the cheaper monitor)
What's your budget? If you can't stay with the VX924, I would still stick with Viewsonic and get the VA902b. This LCD does lack a DVI port however. So you may want to factor that into your decision if you havent already.