Graphics card... ATI Radeon is the best ?
 

I'm looking to build a new computer at some point soon for the video work that I do, would this be a good graphics card?

The VisionTek ATI Radeon HD3650 Overclocked Edition enables you to experience the power of HD with graphics processing designed for entertainment and productivity. State of the art cooling technology supports higher clock speeds than that of original specifications. Factory overclocked "out of the box" combines optimal performance with a 100% stable application environment. VisionTek cranked out an additional 75Mhz clock speed on the GPU to assist with lightning fast response time in game play and multimedia applications. Advance to the next generation of HD game performance and life-like realism thanks to DirectX 10.1 capabilities and plug-and-play ATI CrossFireX multi-GPU upgadability. Watch the latest Blu-ray videos in full 1080p HD -- and upscalable beyond-- without placing huge demands on your CPU> 1GB of dedicated graphics memory for texture rich processing.

Features
DirectX 10.1 / Shader Model 4.1 support
PCI Express 2.0 support
55nm process technology
ATI PowerPlay energy conserving technology
120 stream processing units
128-bit memory interface
High-speed 128-bit HDR (High Dynamic Range) rendering
Up to 24x Custom Filter Anti-Aliasing
ATI Avivo HD video and display technology
1. Built-in DisplayPort technology
Built-in HDMI and 5.1 surround audio
1. Support for the ATI Radeon DVI to HDMI adapter
2. Unified Video Decoder (UVD) for Blu-ray and HD DVD
ATI CrossFireX multi-GPU support for highly scalable performance
Compatible with motherboards that support ATI CrossFireX technology

My preference is for nVidia graphics, these days.

From what I've read and observed, GPU encoding-assist is developing rapidly with every successive generation of those cards, and ATI is more or less stagnant.