I started buying Victoria Secreat bras a couple years ago. After the first one I bought I decided to never buy any other brand! My favorite bra is the IPEX full coverage bra. This is a great bra for everyday wear. The IPEX bras some in all different cuts, but I find the full coverage to be the best for casual wear. The IPEX bras are light weight and super soft. They come in a wide array of colors and some different patterns as well. While the price of them might scare some people away, they are well worth it.
Also make sure to check the sale/ clearance section on their website regulary. They update frequently and I have been able to buy many bras for a fraction of the normal price. They also run great promotions with percentages off and/or free gifts when you buy certain items. Check retailmenot.com for coupon codes before ordering!