T5 light comparison

Looking into buying a 4' T5 setup. I've kinda looked around online and the cheapest I could find was over at http://www.plantlightinghydroponics.com/grow-lights-fluorescent-c-321.html

They have 3 different models of 4' setups, The New Wave, Sun Blaze, and Hydrofarm. The New Wave model costs $300 for 8 light versions, while the 2 others are only $200. My questions are

Why? And what are the main differences between the 3?

Would I be better off shelling out the extra $100 for the New Wave model?

If not which of the 2 cheaper models should I go for?

Am i looking at the cheapest avenues of getting a T5 setup, if not where else should I look?

They have a 6 lamp for $160 at insidesun.com, besides that the prices I found seem to be the best, just trying to figure out which I should get... Am I fine going with the cheaper models around the $200 pricemark, or is it worth spending the extra money for the more expensive models around $300 for the same amount of lights. What are the advantages of these models? I'm guessing they are just slightly better designed or more sturdy or something along those lines.

Ya, I assume your right. It would make sense too, reguardless your using the same bulbs in any fixture. I'm guessing the price difference just has to do with the fixtures reflectiveness/ventilation/quality of materials. I'm now trying to decide between the $200 8 bulb fixture or $160 6 bulb, I'm leaning towards the 6 bulb but still not sure.

:/ Damn so I checked it out and I happen to live in Hawaii, and shipping here is going to be as much or more than the unit itself...I figure I'm better off going with something I can get at Lowes/Home Depot/Walmart etc. Do any of you know if they have any T5 fixtures that would work just as well? I'm guessing I will still have to order the 6500k and 3000k T5HO bulbs though... Will they still work in those fixtures?