I am planning to buy a mini digital grand piano. It has to be a mini digital grand piano (not an up right or a simple keyboard). My budget goes from 3k to 5k. So far I have these three in the list (based on the recommendation of an expert)

Yamaha CLP465GP (Price: 5,000)
Samick SG-310 (Price: 3,000)
Omega LX802 (Price: 4,500)

How the instrument sounds matters the most to me. I have been told that there is no way mini digital grand piano can give you the feel of a grand piano but they do sound like grand piano. I have never played grand piano and am a beginner. Should it matter too much to me if I get the same feeling as of grand piano (I don't even know how it feels for now)????
I will try out Yamaha in my local area but I haven't found anyone who has Samick or Omega in Nj or Pa. Therefore, it'd be great if I can get some input here.
The reason Yamaha and Omega are more expensive is because they have 128 polyphone (can someone explain what this means) and Samick has 64. On the other hand, Samick has 6 speakers with 120 watts while yamaha and Omega has 4 speakers with 80 wattss.
Does having more speakers and watts produce better sound???

Thanks

I'd ask this over on the digital piano forum where a lot of expertise is present. Out of the ones you mention I'd go with the Yamaha. However, this is a somewhat outdated model as well, and there might be more recent instruments in your range.

Why does it have to be in grand shape? There are very nice digital pianos in upright shapes.

because it looks better in the room (wife demand).

this is actually very recent model. CLP465 is pretty good looking and nice sounding digital grand, I have almost bought it.

Piano_Shark,
what about the differences with other models?
Omega has touch screen (colored).
Wouldn't Samick sound better considering it has 6 (instead of 4) speakers with 120 watts (instead of 80)?
By the way if you don't mind me asking, what price did you almost get it for and what state?
Thanks