If the old one is manual, all the fancy features on an S9 or PR machine can be switched off to give you pure, dumb, straight pressure, if any of the bells and whistles bother you. I think it's unlikely to be a problem other than a short adjustment period anyway.
My old machine is straight pressure, no bells, no whistles. It did allow for a humidifier to be attached, but it really only made my throat dry during the change of seasons so I never bothered to purchase one. I've done more homework, my Insurance company will pay 90% per month for 11 months (I pay the 10% each month) then I own the machine. Since my deductilble kicks in at the beginning of the year .. I would have to cover that, but it's small and I'll have to pay it anyway. There is no ceiling on price according to insurer, machines average around 2-3K. Anyone have any pricing? My insurer did send me a list of medical suppliers, so I will have to do the leg work to make sure I find the machine I want. I know price will vary but vendors should tell me their price, right? Since I am paying for this as well.