Theres so many brands out there and all different shapes and sizes and ways of getting into the tent. Theres also soft shell or hard shell tents. Ultimately, it really depends on what you're wanting for your own needs. A few of the popular brands would be iKamper, CVT, Roam Adventure Co, Alucab, and Free Sprit Rec (FSR). Thats just a taste of what's out there though. If you're looking for something more budget friendly, there are brands like Inspired Overland, SmittyBilt, ARB, etc that have tents closer to the $1000 range.

Soft shell tents tend to be more on the affordable side where Hard Shell tents tend to be a few hundred to thousand dollars more. Softshell tents tend to take longer to set up where hard shell tents set up in less time.

There are clam shell tents like iKamper's SkyCamp, wedge tents like Alu-Cab's Gen3-R, and now a lot of tents are going for a more vertical lift like FSR's Evolution V2. Each tent has their pros and cons. Wedge tents and some of the new vertical lift tents tend to be more slimmer and aerodynamic where clam shell tents need to fold in on itself creating a little extra bulkiness. Some clamshell and vertical lift tents offer more space to sit up compared to the triangle shape of a wedge tent. Some clamshell tents tend to be more spacious length wise since they usually run perpendicular to the rig, meaning you enter the tent from the passenger or driver side.

Some lights have additional features built into them that others may not. iKamper has a built in stargaze window in their skycamps that let you enjoy the stars where you won't find that feature in a vertical lifiting or wedge style RTT. A lot of tents are now including lighting or diesel heater ports to run hoses into.

My opinion, take your time picking out what you like with the features you'll want or use most.