I've done this many times with my own tools, and it's always a little scary when using a high speed blade (ie: table saw, chop saw,etc). The safes I've done it is using my Milwaukee hand band saw, it cuts slow and has a lot of torque. With that in mind I'd lean to the horizontal band saw as Hybridsix suggested. I've done it on my table saw with a special 'Aluminum Blade', and cut just a small amount on each pass. Just be real careful when using a high speed blade, and try to clamp the piece down if possible.