Same here, far more control in Photoshop, for me anyway. Then you can save as a bitmap tif and simply place that into Illustrator, resize it, even color it. If you have tones, you could define them in the Bitmap options, line count, angle, dot shape... or, save as a grayscale tif (or PSD) and again place it in Illustrator and size it up. If I'm going to trace it, I usually make it 3 - 4 times the finished size, then reduce it; any of the weird sh!t tracing does is barely noticeable then...
Steve