You don't need any special saw blades to cut aluminum. In fact, aluminum can be cut with any conventional tooling used to cut wood, because it is soft. That's one reason I love working with aluminum, it's so easy to drill, machine, cut, and shape. Might not be as easy to learn how to weld it, but once you do, you'll prefer aluminum welding to steel. You can set up a miter saw, and get some very precise angle cuts with aluminum. Try doing that with a chop saw, or even a band saw, with steel! Definitely not as easy, nor as quick. Aluminum will cut every bit as fast as wood.
Get a Freud "Diablo" blade for your circular saw. They have a thinner kerf than a regular circular saw blade, which means less resistance in the cut, equalling less strain on the saw motor, less heat buildup of the work piece and the blade.
I've cut aluminum plate as thick as 3/8" with a Diablo blade.
In addition to safety glasses, and ear plugs, I strongly recommend a full face shield, as cutting aluminum throws hot shards of metal, they have a nasty habit of flying back at your face.
For thin material, use a plywood blade, and bring the saw to full RPM before starting the cut, and be sure to start the cut SLOWLY, to avoid hooking the edge and having a dangerous kick-back, or a bent work piece. Once you get the cut going, you can run with it as fast as the saw will cut.
Use a framing blade for heavier stuff.
For something where you have to do a significant amount of grinding on aluminum, if you have a very steady hand, you can position the saw over that area to be ground, and work the blade from side to side, taking shallow sweeps over that area, similar to making cuts with a planer, or a milling machine. It works really well, especially considering that trying to grind aluminum with a hard wheel will continuously clog the wheel, and takes a long time. Using the saw as a mill will cut the grinding time by at least 90%
Be VERY careful doing this, though, as you have to hold the guard out of the way while making this cut, make sure to not have any part of your body behind the saw, in case it kicks back.