Chameleons need height over length or width. So a 3x3x2 might be a little short for a panther. Most people use screen enclosures 2x2x4 and some use glass like the 36x18x36 Exoterra. Screen is best if you live in high humidity environments and glass is best if you live in a dry and arid climate. Depending on how deep your pockets are Dragonstrand makes an excellent hybrid enclosure made just for chameleon keeping. There are a few subtle differences in care between a Veild and a Panther. But not enough to say one's easier to care for than the other. I prefer Panthers but I did own a Veild at one time.
T5HO is considered the chameleon standard. ZooMed and Arcadia both make quality ballasts. I'd recommend a 5.0 ZooMed or a 6% Arcadia bulb with a Panther or a Veild. ZooMed bulbs last 6 months Arcadia last 12 months. You'll also need a basking bulb. Any incandescent white bulb will work. You may have to experiment with different wattage to get your basking temps just right however. If you have live plants, which I strongly recommend with any chameleon species, you'll also want a 6500k plant bulb or a LED spotlight. If you use a dual T5HO for your UVB and plant light and it only has a single reflector you'll want to get a 10.0 or a 12% UVB bulb instead. If each bulb has its own reflector you're fine with a 5.0 or 6%.
Males are the colorful ones and live longer. Which also makes them more expensive.