From those two I suggest you get the 100hz model cause its the latest technology which will benefit you on movies and 3d in the future. You dont wanna buy a new tv every 3 years or so.
You should check the panel's response time. Anything close to 2-3 ms is top right now. The lower the better. I have the 32SL8000 which is awesome for games and movies.
I dont think 100hz is a waste of money. Its future proof...

It does not say it has a built in tuner. It says it is 1080p and give you freeview service. Which is a service you don't have to pay for if you connect to the freeview service, which I am sure is through a coax cable connection. If he were to for example try to get OTA signals, he would not be able to.

The defenition of HD-Ready TV is a TV that is capable of HD output but does not include and HD-Tuner built in. HD-TV has a tuner built in.

No it isn't.

None of the 100hz TVs will work with 3D because current models don't allow for 100 hz input. The screen is 100 hz but input has to be 60. They all use HDMI 1.3 and you need HDMI 1.4 which is coming this year. Not to mention that you need a special plug for the glasses which none of them have built in.

I know what the definition of HD ready is, and the one you reccommended is also only HD ready.  And where does it say that it has a tuner?

http://www.lge.com/uk/tv-audio-video/televisions/LG-lcd-tv-37SL8000.jsp

I have a 46 inch Lg scarlett series 1080p, 240 htz for my main tv, in my bedroom I have a 42 inch Lg 1080p 60 htz, to be honest its all over hyped , there is not much difference at all between these 2 tvs, My cousin has a 42inch panasonic plazma 600 htz, we put side by side and did comparisons at very high speed images, also waterfalls, sports , slow mo, lots of things, we were blown away ,there was no difference with my LG LCD tv and His 600htz plazma, no difference at all, he actually wanted my TV instead of his , pretty funny, all the htz crap and speed, is over hype to get more money from you.

Disolitude is correct, they need to be able to receive a 100hz signal for 3D.
There will be 2 types of 3D TV's on the market. Ones that use glasses that alternate left eye, right eye at 120hz and those the TV's that will use simple polarized glasses. It depends on which tech you buy into. The strobe-ing one will cost more and will probably not be the final standard, but they will give more of a pop-out effect.

Damnit, it is an HD Ready TV. I could have sworn it said it was an HD TV, not HD Ready TV. Foot in mouth disease, I have it.

How can they not be 3-D ready when they in fact are 120Hz?

lol...as I said last time, Its cause the current TVs only have 120/240 hz refresh pannel. They don't allow for actual 120/240 signal input.  You need both.

Remember my analogy of bannana in the bum 120 times per second... :)

Its OK, I get it all the time.