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As for being the best, not what I've heard, though depends if you want low or not.
Personally I wasn't interested in the lowering aspect, just wanted the ride to change a little, and the people I spoke to rated the Pro Lines over the others. But agreed if you want it to look lower for the the sportlines, pro lower 10-20mm.
I'm thinking about getting Pro Lines for my 172 as I'm not looking to lower the car much, mainly firm up the ride and make it better through corners. It will no doubt have the unfortunate side effect of causing more rattles.