Palits sonic versions are factory overclocked and usually have bigger coolers to handle the extra heat .
The 9800 gt super + has the 9800gt default gpu and memory speeds but adds more memory .
Take a look at the graphics charts on this site to compare gfx power . The 9800gt is identical to the 8800gt . Same thing , new name .
ATI's 4830 and 4850 are worth considering in that performance bracket . I have a Palit 4850 which is a quality build and since it has the same style double slot cooler as the 9800gt it runs cooler and quieter than the ATI reference model [ as does the Palit 9800 gt to the nVidia reference model which also has a single slot cooler ]