Actually, all LED monitors are LCD, but not all LCD are LED.
LCD is the tipe of display, while LED is the type of backlight. Nowadays most monitors are LED, and it has better contrast, less power consumption, and last for longer.
LED is a superior technology, so you should choose that.
IPS is a very good choice, as it has better colors and viewing angles.
I would recommenda 24'' one, I've had both 21 and 24, and found that the size of stuff on 21'' 1080p is a bit small, while on 24'' is easier to read and see. That depends on your desk and distance to your monitor, though.
Hope I could help.
This most def helps. Thanks again. I just get nervous before making a decision like this. Even more so when going through a third party such as Best Buy. It does say it come with a 3 year part warrenty so if something happens I am assuming i can send it to them and they will fix the problems. I was told by many to look at reviews for the product, it has something like 64% five star and like 26% four star and so on. The negative reviews make me nervous, but i will assume and hope that even the best products can have some issues, even brand new. Is the aspect ratio of 16:9 ok? Thanks again. Oh and my set up would have me close to the monitor and my eye sight at the moment is great.