I'm not knocking the Inspire, or HTC, but I'm almost sure this device won't make it thru the day most of the time. My Nexus One won't and it has a BIGGER battery than the inspire, and a SMALLER screen(3.7in). Now, I hope I'm wrong, but I think we all have a lot of time on a charger ahead of us.
It's not the end of the word...with some planning and an extra wall charger or two it can be done.
For example: Use the charger cable that comes with the device in bedroom, get one for the kitchen/living area for when you're eating/watching TV, get one for the office...and get a car charger. This is what I ultimately did for my Nexus before the 3200Mah extended battery came out.
It can be a pain in the ass to always be plugged in but not the end of the world either.
Also, you guys can give juice defender in the market a try. What you can do is schedule data to be turned off when the screen goes black, and it will turn on 3G for you every fifteen minutes to check emails, texts, etc.., then shut itself off again. This can save you ~15% battery life during the day without you having to do anything. I've found it to be one more weapon against battery drain that helps.