This is a tough question, there are so many decent kits out right now for great prices that it's difficult to nail down the top 5 kits! From my own experience (which is quite limited) I think one of the best kits out right now, especially because of price are Crucials Ballistix PC2-8000-PC2-8500 kits. Infact I'm in the process of trying to sell my Cellshocks to pick up the new PC2-8500 Ballistix!

As far as binning goes I'm pretty sure that Corsairs PC2-8888 kit is right up there. From what I have read their binning process (especialy on the Dominator series) is very involved! I don't know much about Cellshocks (MSC) binning process but their memory seems very consistant overall.

I also think the GSKIll F2-8000PHU2 and F2-8500PHU2 are very decent kits, highly binned to get chips capable of running at 1066Mhz @ 4-4-4-5! Last but not least I think (from people I've talked to and from reading) that TEAM puts in alot of effort binning their modules, at least their higher tier modules.

Warning: I'm not an expert, the above is just my opinion!