Britax and Recaro are two of the highest rated seats as far as safety (not sure about Peg Pergo, I know it's a high end brand, but I don't know if their carseats are worth the price). Graco makes the most popular infant seat, I believe it's pretty high on the safety ratings as well (it's called the Snug Ride).
Personally, I hated bucket seats. Yeah it was nice to be able to easily remove my sleeping baby from the car, but I found with #2 she was just as likely to fall asleep in a sling if I took her all the way out of her seat. Bucket seats are bulky to carry, bang into your leg and cause all kinds of bruises, plus, I found out recently you're not even supposed to put a baby in there for long periods. The angle that they are at is great for a car crash, but it's not as good for sleeping and could cause breathing problems.
I'm going to buy a new Recaro booster seat for my oldest and give the baby her Britax Marathon. I actually think the Marathon is the best carseat ever. The straps NEVER twist, it's super easy to adjust and install, it lasts from infancy well through toddlerhood (my average sized four year old just recently went to the highest notch for height), and you can easily remove the cover for washing. It's just a great seat overall. Best money I ever spent.