First of all, I'd like to thank everyone who shared their Titanium experiences. I would have responded sooner but I dumped a large mug of coffee on my iMac's keyboard just after I sent the initial posting and had to run to the Apple store for a new one. It's always a tough choice when the two products are so amazingly great. I think that I'm just going to wait until the 15" Albook arrives (soon I hope) and then make the decision. One thing that I didn't consider is the placement of the antenna on the Tibook. I'll be using the new Powerbook in a wireless classroom setting using video/image editing and flash animation software. I think that Airport Extreme combined with the better antenna placement on the aluminum models is making me lean in their direction. Brian -- http://www.tvc15design.com