I couldnt say it any better than anyone else has to this point, just to ad a few things though.
A home warranty is always a good thing especially on an older home with aging utilities and appliances.
Discuss it with your agent you may want to put it on up front or use it later as a negotiating tool once home inspection issues arise.
One thing I will say for open houses.If you use a company that promotes open houses utlilize this tool to the max.If one can be done every weekend until it sells all the better.
Although it may be true that the home being held open that day rarely sells at the open house, 3 out of 10 listings do sell as a result of an open house program.(PROGRAM being the key word here)Meaning: if you use a company that has an open house program it means that it coordinates throughout the neighborhoods in which they are being held.(Networking of office & company Agents) Many of us keep a list of all the opens being held in that area that day,and direct people to them according to their needs.
If in your area you have ten open houses it means that agents while not selling the open house they are sitting are meeting buyers in different price ranges and many of them may fit your situation.
They can then be directed by agents at other open houses to your home because they've visited your home during an office caraven and are aware of it's style,details ect.
They may also visit your home with an agent they met an an open house around the block later that week.
The open house also provides critical information to you.How many times are you going to be able to get useful feedback from 10-15 buyers in a 4 hour period. You may not see 10-15 people in 2 weeks.If youre wise you'll use this feedback to get your listing in line with what the public expects of it.
Wichever way you go I think you have received a boat load of good advise here.
I wish you the best of luck in your sale.