One thing to consider when choosing a topper is get one that doesn't pour rain inside the bed when you open it or have it open.
Some do ... some don't.
This^^^^^^^^ can be a bit of a pain in the ---. Depends on what your uses for it are.
I'll second the craigslist idea, find one for your truck and save $$$. You might even get lucky like I did and find one that matches your truck color exactly. I'm not an "appearances" tpye of guy but it does look nice, very similar to the green Tundra pics (mine's a Tacoma, same color). I was thinking I was gonna find a red one that would clash, but Rustoleum would fix that (except for Shrapnel, who it would appear really likes red truck/camper combos
)
Those pics with the rear window up give a good idea of the way water could pour into the camper shell when wet.
Someone mentioned a rake for getting stuff out. I found a 6 ft boat hook on the road near a boat ramp and it sits perfectly right on the "shelf" formed by the bed rail. Handiest thing I've ever found maybe. Pulls the truck box I keep in there right to me. Straw bales, etc too.
Good luck with your search.
Geno
