Late intro, but congrats on the X. Nice rare color.
What make you change the WP? I'm all about preventative maintenance so I'd do them all in one shot: seprentine belts, pulleys, thermostat, expansion tank, radiator, upper and lower hoses.
__________________

00 E39 DINAN S1 //M5 (82k miles)
06 E53 DINAN 4.8iS, born 2/18/2006 (126k miles)
http://www.xoutpost.com/bmw-sav-foru...s-my-dslr.html
90 Straman Z32 TwinTurbo Convertible, (1 of 44 ever made) 5 speed, 444rwhp/451rwtq
01 360 Novitec Spider F1 (26k miles)