My pediatrician also have very strong negative feelings toward walkers. She had handed me a medical journal article about the dangers of walkers and advised us that they were awful for leg development. While I think that if you only have a one level home the dangers lessen significantly, the fact that it makes it harder for the child to learn to walk is something that is very important to consider. Also, if you have carpet, it will probably make it harder for the baby to use anyway. I think that walkers are now oldschool, and not everything that was once glorified should be in modern times.
We bought a jumperoo and I think it is the best invention ever!!! My son loves the jumperoo and we have been using it for months. We bought ours used and paid $45 but it would have been well worth it to have spent the $120 on it new! I think it is a must have for new parents and I always suggest that my girlfriends register for it and learn for my mistake of not doing so. I have never actually seen an exersaucer being used, but I would assume they are similar to, if not just as great as the jumperoo.
Also, I know that walmart sells a brand that has all sorts of stationary activity centers that are similar to jumperoos and exersaucers and they range from $40 to $80. Search their website for "bright starts" in Baby and they will all pop up. This brand is great for people who are on a budget. All of their items are considerable lower than you would find similar items at babiesrus and they are just as cute.