Try out various masks. I bought one of each mask available and tried them all, ended up with the N20. CPAP.com is great for decent prices and direct to consume

Try out various masks. I bought one of each mask available and tried them all, ended up with the N20. CPAP.com is great for decent prices and direct to consumer sales. If the internal pressure is annoying, airtight earplugs help with keeping the sinus pressure even.