Welcome to the forum!

First of you'll want a smoke and sound tank. The driving speed is near proportional, not 2 speed stop and go like the non-smokers. All non-smoke and all smokers use the same electronicsin the Heng Long brand.

The most maneuverable tanks are the American Pershing and Walker Bulldog. Their suspension systems as in real life are more robust and less prone to jamming, throwing tracks, etc.

1/24 scale VS tanks have more powerful guns. They shoot about 130fps stock. A stock HL about 80fps. However, you can easily upgrade your gun to shoot 180-200fps.

If you plan to run the tank outside and through rough terrain, make sure your tank comes with metal gears. Newer tanks equipped with plastic gears have a slipper clutch that engages when the tank encounters heavy resistance, such as busting through weeds or traveling through 3 inches of muck. Get the metal tracks too, the Panther, Tiger plastic tracks break easily and the pins fall out of the PZIIIs without modification. Never had a problem with my American tanks plastic tracks. Real tanks have metal tracks, metal tracks are cool, all of my tanks have metal tracks! Love the clankety clank clank clinking when they travel down the road!
You probably already have these, you'll want a 3000mah+ battery and a peak charger. Throw away the stock BBs, they will wreck the gun. Only shoot high quality like Crosman Glos. Most Paintballs are not round and have seems. Look for seamless paintballs.

These tanks are realistic looking and in their operation, they break! Sometimes before you ever fire them up! Know and accept this ahead of time and you will not be disappointed. You need spare parts to keep them running and you'll undoubtedly want to modify and upgrade your tank. You can't have just one either! Nobody on this forum has just one! I lost count after 12. That being said, you can budget $200 for the initial purchase, you'll easily double that with spare parts and accessories the first time you order!