The short ram will probably work if the TB connection is the same diameter. If not, you can always just change the coupler out so it will flare to the correct size, although the brackets on the SRI (if there are any) will probably not bolt up anymore due to the TB location change.

The DC header will work well for you. I liked my 4-1 better than the 4-2-1.

Cat-back is up to you really. I like the sound of the RS*R exmag, Greddy SP, Apexi WS, Apexi N1 (might be loud for an N/A setup), tech.

Your call on rims.

VAFC really isn't necessary right off the bat. You might come to a point where you will need it or something of the sort based on your needs and goals.

gl