We kind of save that much. We do put 15% into the 401k, but we do not max out the IRA. We just put a a grand or two in there, and we put $120 per kid into their college fund.
We also don't put much into our emergency fund ($200). We do have a house fund that I am current putting money into (anywhere from 0-$800 a month). The amount fluctuations big time, however, because I'm trying to get things in order before third baby comes (we just bought a new snow blower, this weekend we are buying a nice Weber grill, etc.) I don't like feeling cash strapped, so I do allow us some flexibility.
In terms of vacations, we use hubby's yearly bonus for these things. When he gets it, I divide it up into three separate accounts (1) beach holiday, (2) Ireland fund (his parents live in Ireland), and (3) the rest goes into the Emergency fund. I also use our income tax return to make repairs/fix up the house, and anything left over goes into our house fund.
You say you are saving for a house? How old are you guys? If you are closer to 30 than 40, I'd cut back on retirement savings, kick up the house savings, and get yourself the house you want. If you are renting, you are throwing away large sums of money a year. Houses are money sink holes, but they are still cheaper than just renting.
It is only now that we are 40 that we are saving so much. I coupon, and am super frugal (paperless household, always cloth diaper, use vinegar to clean almost everything)...I do plan on coming up with a mommy life savor fund when the third baby comes (lawn service, maybe some cleaning help or babysitting help, etc.)