You're asking for opinions here, and this is mine: Go for it! HDTVs have become not only standard any more (there may still be some digital SDTVs being sold - but not many!), but have become incredibly inexpensive compared to the quality and longevity you get. Plus, how do you put a price on beauty, or enjoyment?
Of course, you can make the argument that they keep getting cheaper (at least until the next wave of improvements - when 4K and OLED start appearing in mass quantity), but it's just like the old question of technology - When do I jump in?
Sure, the moment you buy some tech gear, it's obsolete, and two weeks later the same gear costs less. That's just the way of the world. You have to decide if it's worth it to you - a little money in the bank, or a little money invested in high quality visuals and sound... your call - Good luck!
