I voted Limited, obviously (see sig).
I also own a Tundra, 2000 MY, that is an SR5. Was familiar with that trim/feature level when I started looking at midsized SUVs so I started with the Sport level when I first went to the Toyota dealer...By the time I was done specifying what I wanted on my T4R, it ended up that buying a pre-loaded Limited was cheaper than buying a basic Sport and adding everything I wanted to it. After that, all I had to do was add the non-Toyo goodies like floor liners, vent visors and my Sirius setup - no worries about stuff like the fog lamps, sunroof, nav sys, etc - they were already all included on the Limited we found in the computer and ordered/shipped up here for us to buy.
Don't get me wrong, the Sport was cool, but the non-functional hood scoop was not worth all the additional money it would have taken to get it to the level that I wanted from the get-go based on the available inventory of Sports when I was shopping. The $1700+/- I saved by "just" getting a factory loaded Limited (vs a Sport with tons of factory add-ons post-sale) I could BUY a Sport hood and have it painted to match if it were that important to me - which is wasn't. I have no plans to add anything else to my T4R aside from *maybe* some LED interior lights - though I found a guy locally that can hook me up on a remote start system for a decent price...I may look into it further this Summer. Since Toyota doesn't even offer that on T4Rs (that I am aware of), that's neither here nor there when comparing trim levels...and I do like the remote start feature on the 2 GMs I own that have it.