unfortunately my Black and Decker jigsaw doesn't have that feature. So I'm wondering how hard it would be to angle the edges with my circular saw (which does tilt). Any advice?
are you SURE about that B&D? My old one required an allen key to loosen the foot plate, but it would do angles...regardless, your circ saw will work just fine as long as you go slow and have a fence to work against (long piece of angle iron will suffice)
Also could someone recommend a good router. I'm still reading but I was wondering if I should get a plunge router vs. a non-plunge model. What is the difference functionally? Any other tool recommendations would be appreciated
Depends. Will you use this for anything else? If you plan on using it a lot, get at least a 2 hp model or larger. If you only plan to use this for your cab, consider renting one. A plunge can be VERY poorly made, and for your purposes, probably aren't necessary. The only thing you might want to plunge-cut are your button holes, and you can get a forstner or spade bit to work just as well. A fixed-base router is going to serve you better, and will probably be better made (which will also mean probably more expensive, welcome to tool-buying

) Technically speaking, you could do plunge cuts with a fixed-base router (although nothing requiring a straight side). I recommend Milwaukee first, Porter Cable second, and DeWalt/Ryobi/Bosch/Makita/Hitachi last. If you're looking for BUDGET budget alternatives, B&D makes DeWalt, for what that's worth. Sears will probably be decent, too.
Home Depot has a Ryobi Kit with three interchangeable bases for $150...dunno about quality, but it's a pretty decent buy for the price.
Buy carbide bits. It'll be worth the expense.