With the Core i7 you will need a single radiator - the Gigabyte 3D Galaxy and TTake 850i radiator is the smallest you can use on a stock i7, so if you want to add VGA into the loop you will need a radiator of at least 240x120mm. You could go for the Gigabyte system to get the VGA cooling, then just enlarge the radiator on it to allow for the increased heat load.
The problem with both of those systems is that they were designed with Pentium 4 and Core 2 Duo processors in mind, which produce less heat than the Core i7.
I would also suggest going through the sticky in this forum on watercooling. There is a lot of information there about the problems people may encounter.
I'm not entirely certain, since most of the cooling equipment I use is completely custom-made - living in South Africa makes computer cooling components prohibitively expensive. For example, Thermaltake makes a 120mm radiator that fits into a 5.25" bay. Here, one of those radiators can easily cost the equivalent of $150.00 plus. By contrast, $20.00 gets you a 250x180x30 heater core from a car. Same story with the pumps, tubing, and blocks.
Spending $200 on quality components will get you a lot further than $200 on a TT or Gigabyte kit. I'd steer clear of 'kits' and if you do some research on components, you will learn a lot about what to get, and a ton of what to avoid.