IMO, purchase a basket or something similar. Yeah, it's more expensive, but it gives your 4Runner a "cleaner" look. Instead of just adding lights to your existing OEM rack, add them to something else to make everything "flow" together. Not trying to knock what others have done, I just like the basket idea.
I did not purchase my rack and lights all at once...I'd be looking for a second job otherwise. I purchased everything over time and once I had all the parts needed, I then installed everything in one big bang.
Hopefully in the next 2wks, once I get all my pictures together, I'll be doing a thread showing my new rack, lights, etc. and you can see how it looks to give you a comparison.