If you have enough cashflow to float you over to your next paycheque, and are willing to make a big payment, it's always worth it to pay off the entirety of your loan balance as soon as possible. I can't really say about what's best for your credit score, but paying off that last bit of your loan asap, especially if it's in one big chunk, will save you a bit of money on period-on-period interest. I would imagine paying off a loan before it's term would normally be due would be good for your credit score, but can't say for sure.
Once it's paid off try and keep saving that same monthly amount towards a new home. Just chuck it in a saving account or open a RRSP, throw those monthly contributions in and reap the tax benefits come next April (or March if you're Canadian like me). If you're Canadian the feds have a program where you can make a one-time withdrawal from your RRSP, tax-free, to put towards the down payment on your first home (but only your first home). I'm not sure if similar plans exist in the US or your particular state, but it's worth looking into. It's never too early to start saving for your retirement. (Lame yes, but prudent advice)
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