and how good is 1080p in comparison to what i got now?

Seeing as that the PS3 comes with Composite 480i cables, compared to 1080p, is like night and day. 

Do you have an HDTV?

I got the popular samsung lcd tv with the blue light on the bottom , hd ready

Is it 1080p?

or 720p? 

If it's 1080, you need HDMI, but if it's only 720, Component cables will be fine.  But either of them is better than 480i.  By a long shot.

How the hell would i know =P

What's the model number?  If you don't use HDMI all Blu-ray movies will scale below 720p as part of the copy protection.  Games will still do 1080i/720p.  If you have a 1080p capable TV, you should use HDMI.  A decent HDMI cable can be purchased for less than $10.

Good god, you don't have an idea what it is?  Look at the box or instruction manual that it came with.  It's a huge selling point if it's 1080p or 720p.  Should be easily seen.

Anyway, after you find that out, buy PS3 component cables if it's 720p (most (all?) HDTVs use Component cables).  If it's 1080p, buy HDMI (If a TV is 1080p, it has HDMI, IIRC, but a 1080p set can still (and probably will) have Component input too).  Eitherway, both resolutions are miles above what 480i offers.

Samsung LE26R8B1

or something like that

it says, this lcd supports its maximum resolution in 1080i

720p and 1080i?

Normally on a 1080i set, you can still use 720p.

And in either case, you can still use either HDMI or Componet cables for a better picture than 480i.