Intercoolers

Hi,

So I'm looking at an intercooler as mine is pretty stuffed. And may as well go bigger (bmw e46 330d 135kw)

Now what makes a good intercooler. I understand there are different types and bar and plate is the way to go?

I have found this company that uses imported bar and plate cores Link .

I do not want to spend R6 000 on an intercooler. I am looking more around the 2.5k - 4k mark...

If I were to use that company what specifications should I give them for the cooler?

Or are there any alternatives you can recommend? I see there are alot of cheap alternatives around R1600 but I don't think these are going to be any good...

Found an interesting read. LINK

So should I find out what brand of core they are using.

And what dimensions are going to be ideal for the 330d...?

Thanks