Dr. H,
I'm not saying a will isn't needed, it is a need. However the will is something that needs maintenance and it is only a wish. Any will can go thru PROBATE. Probate can last 3 to 5 years after you die and I know you don't want what you leave behind to be tied up. A trust prevents that.
Create a trust and sign everything you own over to the trust, ie "Da_Sperms Family Trust". Turn over your car, house, bank accounts, stock, bonds, funds, real estate, painting, etc over to "Da_Sperms Family Trust". Put your wife and kids in the trust. When you die, the trust still lives. It can't be contested because only members in the trust can have what the trust owns. A trust cost about $1500 to $2000 to setup, then from that point own its simply up to you to release everything you own out of your name over to the trust.
Once you die, these people that do nothing but look at the paper everyday to see who has died and then go down to the county clerk office and see what you own will get nothing. Why? Because when they get to the county clerk office, your name isn't on *ish. It's all in the name of "Da_Sperms Family Trust". NO PROBATE! The IRS can't even collect their INHERITANCE TAX.
I say start off with a will, once you put your name on a home and you have a spouse and or kids, get a trust.