The Geforce 3 ti 200 is faster than the Geforce 4 MX 440, and it has those nice directx 8 features that will come in handy when Unreal 2 comes out around Mayish and Doom 3 comes out......err when its done.
The MX4 has faster Ram & makes very good use of it with Light Speed Memory Architecture II, but it doesn't have any DX8 functions (It's not like many games use it so far, besides Aquanox I can't find any other one :blackeye: ).
If you stick to DX7 games you might as well go with it.
It has a lot going for it ( TwinView, 100% hardware DVD decoding, AcuviewAA, etc...)
I would rather wait for a GF4TI420 myself but then again my TI200 is working well so far