Given that power5 is an experienced shooter on other platforms and said right out of the gate that he wants a boomer for fun, a .454 isn't a bad choice. Is it the best choice?
Well, .44 magnum is a step down but it's still pretty powerful. It's arguably more comfortable and controllable while still making a big boom. It's enough to hunt with if he is ever so inclined. It's also a lot more common with good variety and availability.
If you go this route, take the time to look at used guns from Ruger and Smith and Wesson. Even used, I'd be more inclined to pay a little more for one of them in good shape than I would a new Taurus. I don't have a lot of experience shooting them but I've closely inspected some of their products. They just aren't as nice and some are worse than others. The way I see it, you are ready to lay down the better part of a grand. That's a serious investment for most of us. If it is something you will love, have for your whole life, and maybe leave to someone you care about when you go... what's a few hundred more? Seriously, set the money aside and add a little to it each paycheck until you get there. Think of all the times you'll be glad you did!
BTW, if you really want more power than a .44 magnum, save up and get yourself a .460 XVR. It'll shoot .45, .454, and the incredible .460, which is really something if you've never had the pleasure. Between the grip, compensation, and large sturdy X-frame; it reigns in all that power more comfortably than most guns you'll find in .454 Casull.