a few thoughts
1. glidden is not bad and SW can be pricey to start just be sure that you get a price quote and watch it (everyone here has dealt with different prices at different times of the year without notice)
2. how much painting do you do does getting a "better product" really justify itself if you have to repaint alot?
3. are VOC an issues be sure to check into that most hositpals have guildlines on that if so harmony SW or eco spec BM
4. what is the price you are looking for on the paint? and how much paint will you need most store will give you a job quote if you can promise X amount of paint to them
to me it make so sense to put money into a project that requires a lot of repainting anyway. you will what a better paint for application sure, but be careful not to be "oversold" an any product no matter where it is. what i would do is make a list of what you want out of the paint and take that to the store. visit more then one place, and it some cases more the one location of the same store. also do not tell them what it is for and see what product they quote them tell them what it is. You will find this interesting
hope this helps