Hi there. I'm a mom. I'm also an OB nurse who has witnessed plenty of newborn circumcisions.
You know, I used to read Yahoo Answers often and I'd respond to people asking and try to persuade them not to circ. Now, personally, I don't care if you circumcise your son or not. I could state how many of the studies that doctors quote are old, out-dated, and non-pertinent. I could tell you how so many of the mom's who say uncircumcised boys later get "infections" and have to "get cut later on" are mistaken or just blowing smoke at you (the truth is US doctor's try to retract and manipulate penises to the point of causing redness and infections, and then recommending circumcision because they make money off of doing them).
I'm sure other people will tell you that most of the males in the world are uncircumcised and do just fine and how the US rate is now around 50/50, so your son won't be the only boy circumcised or uncircumcised no matter what you decide. I'm sure other people can fill you in on facts as why you don't need to circumcise. As far as why you "should" circumcise, some person named "sarah rr" will be on shortly to spew her pro-circ agenda.
Do what you want to your son. It's no skin off my back. It is skin off of his otherwise normal and healthy penis. But it's your decision, not mine.
So to answer your question, I am a mom and I did NOT have my son circumcised. My husband IS circumcised but we left our son intact. He's never noticed the difference and it's a non-issue in our house. My son has also never had any health or hygiene issues and has both circumcised and non-circumcised friends in his age group.
The reason we left our son intact is because as a nurse, I've seen plenty of botched circumcisions, probably just like what your other son went through. All of the doctors who messed up the circs were very skilled and experienced, but accidents happen and you must be willing to take that chance when you opt for a non-emergency surgery. Major complications are rare, but they do happen. Sometimes minor complications occur and lead to painful skin bridges and wound infections like MRSA. Again, it's rare, but why risk it if it's not necessary?
If your sole reason for wanting to circ your next son is because dad & brother are, I wouldn't worry about it. Your son will always look different than his father and boys don't go around comparing genitals all day long. And most likely you'll be the one potty training him, and you look *really* different than he will, kwim?
Best of luck in your decision.