Which is better? I need Lipo technology.

[Batfish]

If you're prepared to spend the $, there is no safer, complete, all-in-one system than the FMA/Kokam systems (Scorpion or BalancePro) at this time. The difference between the two is that the Scorpion has a built-in low-voltage cutoff (LVC) and the BalancePro doesn't. You can purchase FMA's LVC for less than $20 and install it in your vehicle to accomodate whatever 2s lipo pack you put in it.
I chose to go with the BalancePro since most of my ESCs have cutoff protection and I can purchase the LVC for those that don't, which saves me money in the end over purchasing the Scorpion system.

No other systems come with such a high safe charge rate and cell balancing right out of the box. Others either have taps or require you to install taps to charge individual cells for balancing purposes. I'll take a pre-configured pack any day :)