There's no such thing as a radiator above and beyond OEM or OEM-equivalent that is not a "high performance" piece. The PWR is nice, and sometimes you can find a Koyo all-aluminum one for about $350.

There's nothing inherently wrong with the stock design, and if you think about it the one you've got has lasted this long so replacing it with a similar piece can't be that bad if you're in a pinch for the dollar signs.