120Hz frame-rate conversion vs true 120Hz refresh rates on new LCD HDTVs?

Question

What will I notice different as an end user between a LCD HDTV with 120Hz frame-rate conversion like the Sharp LC-D82U Aquos as compared to a LCD HDTV with true 120Hz refresh rates like Samsung LN-T71F series? This 120Hz refresh rate is really new and only available on around 4 LCD HDTVs I have seen and I am wondering if I should insist that my new TV has this feature. I was planning on purchasing either Sharp LC-D82U, Sony KDL-52W3000 Bravia, Samsung LNT5265F or Toshiba HL167 Regza, but after researching it turns out none of the 4 TVs has true 120Hz refresh rates. The Aquos has 120Hz frame rate conversion? Will one of these TVs work or do I need to buy the Samsung or Sony with 120Hz refresh rates.
FYI, this TV will be the hub of home entertaintment where I will be running desktop CPU/internet connection via HDMI, Blu-Ray, HD DVD, Hi Def Programming and a Wii.
Thanks So Much for taking time to help

Answer 1

120 Hz is a relatively new technology.
120 Hz TVs use a variety of techniques to do 120 Hz: frame repetition, black frame insertion, gray insertion, or motion estimation/motion compensation.
120 Hz helps with the response time in LCDs, so if you see any improvement, you will see it in film jadder and very fast motion. I think next year the technology will improve even more. For now, I would just stick with 60 Hz TVs.

Answer 2

The higher refresh rate will help reduce the blurring of fast motion and any apparent flicker on high brightness scenes The refresh rate is the number of times the scene is reproduced on the screen in one second. 120 Hz is better. The larger the screen the more noticeable the differences will be.

Answer 3

I very much doubt you will see ANY difference. I'd be more concerned the HDTV accept a 1080p/24 fps signal (and even that will only give a marginal improvement over 1080p/60fps.