Woodworking and aquariums - never been a better combination since peanut butter and chocolate...
Anyway, I'd stick with Porter Cable for the brand, I've got two and I use them frequently and I've never had a problem with them, they both have interchangeable collets so you can use 1/4" or 1/2" bits.
I'd stick with 1/2" bits though as they're far safer.
For smoothing edges, a 2 or 3 flute carbide bit with a ball bearing guide is definitely the way to go unless you want to set up a router table with a fence. Personally I prefer to move the router rather than trying to hold a sheet of anything flat and snug to a fence unless you want to mess with infeed and outfeed tables and some other form of support to hold the sheet up. Most router tables are pretty shallow from the front to the bit.
Also, consider getting the D-handle base or buying the kit that comes with the D-handle base. I feel far more in control with a D-handle than just those two little knobs.