Exemptions/Allowances on my W4???

I am married filling jointly but my wife does not work. I have 2 kids. I just started a new job ($100K) and am trying to figure out how many exemptions/allowances I should claim on my W4 so I don't owe or get a big refund. The last 6 or 7 years (making $90K) I have claimed 4 and have always ended up getting a big refund ($3500). I would rather take more home but not owe at the end of the year. Any help would be appreciated.