I went with Cobra Speedster Duals W/Power Port. Nice sound. Might not be the best for performance, but look great, sound great, and are better than stock for sure.
As far as high flow air cleaners, go with what you like the looks of. They all give more air than needed. Not one really is better than others, nothing you'll ever notice.
Tuners.. comes down to what your plans are. Stage 1 and done? Don't need anything real fancy or expensive. Are you planning on bumping up to stage 2, 3 4? Get one that'll expand and tune for the up grades. Have fun with your search.
"I'd rather have a bottle in front of me, than have to have a frontal lobotomy." ~ Tom Waits