You can keep plenty of stuff under 4* 65 tho' some things will only thive under the 4*96. So it's time for some questions you need to ask your self....
1. What do I want to keep. What are it's lighting, water movemnt needs - don't know this, do research before spending money. Do you want to respend the money in 6 months time?
2. How good at maintenance are you - if you're real sharp at keeping things clean, replacing bulbs every 6 months, running carbon continuously you can get away with a lot less light than you think
3. Deep water is bad for underpowered bulbs - inverse square law rules - deep water = big bulbs. You might need to keep stuff near the surface. If you want to keep clams or brightly coloured sps in 2 feet of water you will be talking MH rather than PC anyway.
I would bear in mind you'll be changing those bulbs every 6 months. 250 dollars more for the 96's seems ridiculous to me. I am assuming this tank is something like 4 feet long, 2 feet deep and 12 inches wide (very narrow for decent aquascaping, but thats a separate artice). And you live in Germany I think(?). I'm amazed anybody even stocks PC bulbs there as they aren't especially efficient, I'd go down the shops of ebay and et 2 150 Watt DE Metal Halides (HQI to the germans). Should be about 400 dollars for the 2. If not thatt, get a 4 tube T5 luminaire
