Aside from EzPDF which I've been having issues loading large file slowly, I've just now tried Repligo and Mantano.
Repligo and Mantano both seem to render the images more quickly than EZPDF. I feel like Repligo is missing some pretty nice features found in some of the others. Mantano is looking like a pretty good option. Nice UI, fairly quick rendering of my larger PDFs along with some nice features. Although I feel like the text quality in Mantano doesn't appear as good.
For now, I'll probably split my PDF usage between EzPDF and Mantano. Anyone have any other pdf apps to try?