Yeah, I'd definitely get a mac, not an hdtv. Consider that the 24" imac has about the same amount of pixels as the hdtv does, but is 24" instead of 60". This means that the pixels are much more densely placed, resulting in a much, much, much sharper image than the 60" tv can offer. Just because they're both HD doesn't mean that they'll both have great quality.
MacBook Pro Intel Core Duo 2.0ghz, 1gb ram
Dell 228WPF 22" monitor
Mybook Premium 320gb
iPod Nano 4gb (red)
Wacom Intuos3 6x11