I have a Mirage Swift Mask, which has nasal pillows, and it is extremely comfortable and has no leaks.

I have had it for only a week, but I couldn't imagine using a bigger mask instead...

...and seem to be habing similar sinus trouble. I wake up with pressure in my sinuses and some minor sinus pain. I am going to try using flonase to see if that helps.

I just got started less than a week ago. Love the CPAP, but want to avoid infections.