On the one hand you'll need savings in order to buy the house obviously. But on the other hand, an outstanding loan will effect how much of a mortgage the bank will offer you so you need to take this into consideration also.
As a rough guide, the bank will want to see that the monthly cost of servicing your debt (i.e both of your car loans + mortgage repayments) is less than about 30-40% of your joint net income.
So the answer really depends on what your joint incomes are likely to be when you apply for a mortgage.
On a side note, your CU loan looks like good value. If you were to make these repayments in cash, then it'd be up to you to declare this outgoing to your mortgage provider as the repayments wouldn't show up on your bank statements and CU loans aren't usually listed in an ICB check.