I've been considering doing the same upgrades myself. Although Dinan's prices are rather steep for the gains achieved I trust that their power gain claims are not "optomistic" like most manufacturers. I also like the design of the intake kit. I've seen some other CIA kits that look tacky and "added on". Ugly sheet metal boxes and smaller surface area filters. The Dinan unit looks very well designed and was made specifically for the X3. I'd much rather have that under my hood. Even if it does cost a little more.
The High Flow Intake System and the Stage 2 programming seem to be the best combination for the price/performance gain but I'm really tempted to go (almost) all the way. High Flow Intake System, Throttle Body, and the Stage 3 programming. The only part I can't justify is the $999 exhaust.
Congrats on your mods and let us (me
) know what you think after your trip!