You see, you can get DDR2 with Micron chip with cheap price. That is A-Data Plus series or X-Series.
If you're going DDR3, A-Data Vitesta Extreme Edition has good performance, can be overclocked highly, although non-Micron. But it's cheap & has great compatibility with almost all Mobos.
The A-Data comes in three variety: X-Series, Plus-Series, G-series. Gaming series is G-series. X and Plus is geared toward overclocking, though X is best at overclock. You can visit their web site here:http://oc.adata.com.tw/product-series.asp?sid=03
They have lifetime warranty, along with cheap price. (and Micron chips for DDR2 memory). So I guess this is very great.
The downside is, the heatsink looks like 'glued' to the memory, making it quite worrying of getting plucked off.