A friend of mine recently got divorced. The lawyer fees were $140K on both sides (ie. $280K total

) due to the haggling over every possession, etc. I can only imagine how much the lawyers were encouraging all the bickering. What a fricken waste of money, they threw away about half the value of their house!
Definitely go down the self help route if you're willing to do a little research. Seems it is just in the blood of lawyers to argue, and they won't be able to help themselves from suggesting to each of you that you deserve a little more for one reason or another. A 50/50 (or 60/40) split with no lawyers is bound to be better for both of you than anything else that would result with lawyers involved.
If you do decide to use a lawyer, I'd say work out all your details first, and then go to a lawyer together (maybe one that DOESN'T specialise in divorce) and firmly say "this is exactly what we want, just give us the papers".