I have a VisionTek GF4 Ti 4200 SE and the only difference that I know of between it and the non-SE version is that the SE doesn't have a DVI connector. I don't need the DVI anyways so it's no big deal for me. I like the card a lot.
But with that said, VisionTek is going out of business and with the card still costing $169 it's not worth it. There are some fine GF4 Ti 4200 cards out there for $20 or $30 less with better software packages and warranties. Shop around and avoid the VisionTek, that's my advice.