Clear... it might be better than the original, but if you're resizing, it's better to use specialized tools! The result will be less blurry... this defect is noticeable on larger monitors (over 24").
Yes, I usually use Gigapixel AI, but it doesn't always give good results. I'd like to know what the author of the mod I mentioned above uses for upscaling.
Although, I still think that there might be some issues with the export settings. I export in DXT5, with bicubic compression. I have the feeling that it still blurs the image a bit.