I'm currently using a (much smaller) TV as my monitor, and though it will usually behave itself and run at 1440x900 like I want it to, it will sometimes reset the resolution itself on start up. The TV my roommate uses, however, has never once done so. So I think the above quotation is probably the best answer you'll get... unless someone has first-hand knowledge with the TV you're planning to use >.>
Out of curiosity, what's the TV's response time?