What aspect ratio screen I should buy?

I'm going to go with a front projector for my HT. Should I get a 16:9 screen or 4:3 screen? Thanks a lot, Shenzhi
Well,either way,you're going to have black bars somewhere. At the top/bottom or at the sides. The world isn't all one or the other.I assume dvd and Direct tv's hdtv would be the enticements-go for the widescreen.So you'll have black sides on 1:33 material.
I would go with the one that gives you the biggest sharpest pictures regardless how big the black bands on the sides may be. I find once I start watching a movie, the rest of the screen not lit disappears.
i don't know how large your budget is but some of the higher-end screens remotely adjust to either format, leaving no "black bars."
You are going to help answer that question. If you watch mainly TV, satelite or cable 4:3 is a better choice. If you watch mainley widescreen DVD's, HDTV, or you are a widescreen nut like me, buy widescreen. Typically a 4:3 TV will be cheaper than a 16:9 TV of the same performance. The reason is they use the same boxes as their standard NTSC tv's, and marketing. Some manufacturers are not making their top performance products in 4:3 aspect ratio. Over time there should be more 16:9 programing. It is anybodies guess how long will that be. My experience is a change takes longer than you expect. I owm a 16:9 HDTV ready Tv, and the anamorphic DVD's are outstanding. I will be getting HDTV satellite TV next month, but programing is very scarce. I do not get local HDTV, (I wish). Good luck
One nice compromise TV you should consider is the Sony Wega (Vay-Guh) XBR. Those have circuitry that can vertically stretch a DVD movie should you choose. This slightly distorts the images, but does use more of your screen. I have one and find this feature makes the DVD's much more enjoyable. Now DVD's just make my 36" TV look like a 20" instead of a 13". I'm so thankful! The new generation XBR400 has built in HDTV decoding.

If you are building a Home Theater with the intention of playing DVD's, I recommend a large 50"+ widescreen TV. DVD's are the way to go, and you need a large widescreen to enjoy them. I notice that the tv show ER plays in widescreen.
Whatever you choose, purchase a screen size suitable for your viewing distance. Trying to watch a 27" 4:3 fron 20' away is silly, as is watching a 50" from 3'. The point made that 16:9 COST half again or twice as much as 4:3 is something to consider. A Sony 36XBR400 is $2300 and the best price on a 16:9 with equivalent or better features is $3500+ The 4:3 Sony has "as big" a picture as the 16:9 in letterbox but then gives you a full 4:3 36" in 4:3 TV etc... AND that 4:3 costs almost HALF the price of the 16:9
Yeah if I weren't in the twilight zone I might had actually read the intro more carefully. please disregard my not appropriate blabbering about direct view TV's