Maybe Tom's had a problem, but a friend of mine has a 9600 PRO and seems to run Far Cry just fine. When all the settings are maxed out it stutters of course, but he gets good FPS when the detail is set to reasonable levels.
He has to set the environment detail to medium and make some other compromises, but he can still run it nicely with PS 2.0 enabled (The "Very High" lighting setting), and that's what DirectX 9 is all about in that game.
As far as flight sims go, they are still more CPU than GPU limited, IMHO. You're better off with an Athlon64 and a 9600 PRO than you are with an Athlon 2600+ and a 9800 PRO in that specific application, I reckon.
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<b>Radeon <font color=red>9500 PRO</b></font color=red> <i>(hardmodded 9500, o/c 340/310)</i>
<b>AthlonXP <font color=red>~2750+</b></font color=red> <i>(2400+ @2.2Ghz)</i>
<b>3dMark03: <font color=red>4,055</b>