Most of the maintenance is pretty straight forward on both cars, you can only change the oil, rotate tires etc one way and you do it the same on both cars. Now as too any special maintenace to hybrid you are under no obligation to go to dealer you can find good competent mechanic who can do the work for you, no fancy waiting room, no cookies, or soft drink most likely no loaners but half the price. As long as he does all the work they call for and its documented your warranty is fine (keep paper work)
As to savings on gas, I would love to see some more current numbers on how long takes you to offset cost of hybrid, I think last study I saw was way back when gas was about $2.10 or $2.25 now that its 3.25 or more and going up up up how long will it take? What if we are at $ 5.00 next year and stays there, go try and buy a a hybrid than.
From the sounds of your post your really torn, I think you need to drive both cars same equitment and that will help you make your choice, other option is to find a very slightly used hybrid say 5-8k miles on it so much of depreication is taken for you. That worked well for me. I bought one with 7K for about 8K less than new that was 1 year old.
Just some grits for the mill