My first sack of 2 row was Briess, because that's what my LHBS had at the time. I had no issues with it, but also really had nothing to compare it to. My second sack was Rahr after several suggestions here for that Maltster. I have like it a lot, but really have not made many of the same brews as I did with the Briess. That combined with my uneducated palate leaves me with no real opinion other than the Rahr was significantly cheaper, so i know what my third sack will be. As far as just one base malt for most brews, I'm not there yet. I have partial sacks on hand right now of Rahr 2 row, Weyerman Munich I&II, Avangard Pilsner, and Crisp Mari Otter. Sooner or later, I may try same recipes and subbing things out to see what I really like, but I'm not there yet. The best part of sourcing these sacks was finding out that the LHBS offers a 30% discount on sacks of grain that are pre-ordered and pre-paid. As long as I have an idea of what I want to brew, and when, I can get that discount if I am willing to wait up to a couple weeks for it. They have also been willing to let me pre-order/pay for sacks of specific products they do not normally carry in store for small purchases.