I installed a pair of those Stabilus struts in my 04 S a few months back and they've been great. Not getting bonked on the head by a rather heavy lift gate anymore is quite nice!
Might want to keep looking price-wise, though. I picked mine up for a smidge under $88.00 (including shipping) for the pair. Granted, its ain't a huge difference in price, but, hey, 30 bucks is 30 bucks!