Wear it around your neck or on your belt then the weight isn't as big of a concern.
Forget about the saw, unless you carry a full size buck saw, a 3-4" knife will be able to cut better/faster/with less effort, anything that small saw could handle.
Learn how to use a knife properly, and you'll find you don't need a saw for anything survival related unless you are planning to build a log cabin.
I would agree with everyone else about the Mora if you don't want to spend much, or check out Ragweedforge for some of the nicer knives he carries. There are a lot of great custom/semi custom makers out there as well.
Question is, are you looking to spend under $60? Get a mora. Or can you afford to spend $100 or more? Plenty of semi customs out there, as well as the other knives on Ragnar's site.
The Izulu's are nice little knives, but a little too thick for such a short blade in my opinion.
Also, keep your eye out for something in your price range over here: http://www.bladeforums.com/forums/forumdisplay.php/754-For-Sale-Fixed-Blades
Ray Laconico, Fiddleback Forge, Dfarmer, all put out some really nice stuff.