Bare wire will work fine.
Just make real sure to twist the exposed wires and when attaching them to the speaker (and amp) terminals that no loose ends stray and touch the other terminal. Poof!
Nobody actually "needs" banana plugs but I find them preferable because it simplifies the hook up procedure. The hard part is done in wide open spaces and all you need do behind the amp and speakers is simply plug 'em in.
If you are using 16 gauge wire, RatShak sells some cheap banana plugs that are more than up to the task.
Aa far as sonic differences between bare wires, spades and bananas? Nah!
BTW, nice choice on speakers. Got 'em myself and love 'em. I'm also using B2's as surrounds.
I've used banna plugs....
on every system I've done for the past 3 years. You might be able to live without them as far ast hooking up individual speakers... but when trying to wire speakers in an AV receiver, they're flat out invaluable. There's nothing tougher than trying to wire 5 or 6 speakers to a AV receiver that's in an AV stand, with insufficeint light room. Two smartest things I did... labeling the individual sets of wires... and using banana plugs... in and out.. snickity snack..
Da Worfster :o