A set of '773' profile cams from Matt Humphris, which are 264deg duration and a smidge over 9mm lift. You can get away with standard valve springs and the older top biscuit shim followers on them. Power band will be 2500-7500, so a healthy spread of power and enough to pretty much max out the stock head in terms of flow.
As an alternative there's a '1601214' profile cam from Catcams which are 270deg and a bit more lift at 9.50mm but you need uprated valve springs with these as they're a tad more aggressive. I'd only recommend these if you have the later solid followers on your CGA3DE (some come with them, some don't). If you have the older type with the top biscuit shim, I'd stick with the '773' profile cams to mitigate throwing a shim and killing the engine.
