It depends on how quickly you want them. Often the kits come in blocks already, which adds to the price but then again you don't have to do any mounting which can be a pain at times. I sometimes feel the urge to mix and match as there are certain parts I think are best made by one company while others by others. The only one set that I would buy all together would probably be the Shocktech. Otherwise my current picks of the lot are the MacDev Sonic, DYE 3 way (because I love the Bomb for all the right reasons but don't like how it can wear orings sometimes and doesn't take the standard size, plus the DYE can sometimes be found cheaper and hey, I like variety) or the ANS, and the STO and Clippard Rams. It would be a wise choice to shop around online and eBay and at events, perhaps piecing together the best deals that you can get individually and perhaps save 20% or more in total.