I vote bananas over bare wire for consistency, neatness, convenience when you need to unplug/replug/move/rearrange/troubleshoot, plus it seems easier to avoid the possibility of that one stray strand poking out threatening to short an output. Connection resistance specs are usually around 0.01 ohms per connection, about like adding 1 m of cable (14-gauge).
14-gauge speaker wire seems plenty heavy for home theater (0.14 dB loss, 25 foot run, 8 ohm load).
Monoprice is a terrific source, never been unhappy with anything from there.
For audio cables, I like Hosa. Heavier gauge than the cheap stuff, decent price, reliable (I have never had one fail), ends are often labeled (tip, ring, etc.), good variety of styles and lengths. Available from Amazon, Musicians Friend, Zzounds, most music supply sources online. Monoprice probably has a better range of available lengths, but I have not used their audio cables, no experience there.
RadioShack audio cables - expensive, the premium grades appear to be good quality, selection is limited to fairly standard varieties and lengths, expensive, a possible resource for "you need one right now" emergencies.
Another emergency audio cable resource is your local Guitar Center, good selection, good quality, price not outrageous.
Nothing wrong with building cables yourself, have done so, getting lazier, now almost always buy premade.