I have to agree with Smiff, here. The FX5200 is great value for money card (it's half the price of the ti4200) and supports the Pixel shaders being considered for Nemu. Here's the specs off it:
128 Meg GForce FX5200 TV Out
Key Features :
CineFX shading architecture
Support for DX 9 pixel shader 2.0+
Support for DX 9 vertex shader 2.0+
Very long pixel programs up to 1024 instructions
Very long vertex programs with up to 256 static instructions and up to 65536 instructions executed before termination
Looping and subroutines with up to 256 loops per vertex program
Subroutines in shader programs
Dynamic flow control
Conditional write masking
Conditional execution
Procedural shading
Full instruction set for vertex and pixel programs
Z-correct bump-mapping
Hardware-accelerated shadow effects with shadow buffers
Two-sided stencil
Programmable matrix palette skinning
Keyframe animation
Custom lens effects: fish eye, wide angle, fresnel effects, water refraction
High-performance, high-precision 3D rendering engine
4-pixels per clock rendering engine
128-bit, studio-quality floating point precision through the entire graphics pipeline
Native support for 128-bit floating point, 64-bit floating point and 32-bit integer rendering modes
Up to 16 textures per pass
Support for sRGB texture format for gamma textures
DirectX and S3TC texture compression
High-performance 2D rendering engine
Optimized for 32-, 24-, 16-, 15- and 8-bpp modes
True-color, 64x64 hardware cursor with alpha
Multi-buffering (double, triple or quad) for smooth animation and video playback
Antialiasing
Blistering-fast antialiasing performance
Adaptive texture filtering
Fast Z-clear
Advanced display pipeline with full nView capabilities
Dual, 350MHz RAMDACs for display resolutions up to and including 2048x1536@75Hz
Integrated NTSC/PAL TV encoder support resolutions up to 1024x768 without the need for panning with built-in Macrovision copy protection
DVD and HDTV-ready MPEG-2 decoding up to 1920x1080i resolutions
DVI Support for compatibility with next-generation flat panel displays with resolutions up to and including 1600x1200
NVIDIA NVRotate application for advanced viewing flexibility
NVIDIA NVKeystone application for advanced display correction
Digital Vibrance Control (DVC) 3.0
DVC color controls, DVC image sharpening controls
AGP 8X support
AGP 8X including Fast Writes and sideband addressing
Operating System
WindowsR XP, Windows 2000, Windows Me, Windows NT R (all), Windows 98
API support
Complete DirectX support, including DirectX 9.0 and lower
Full OpenGL 1.4 and lower support