What is the best financial/tax situation for a family with a kid on the way?

What is the best financial/tax situation for us? Kid on way, financial aid eligibility concerns. Me: grad student for 2 more years, on a teaching assistantship (this covers tuition, fees, health insurance, and gives me a $1600/mo. stipend) and with some student loans on top (less than $10k/year). I also work in the summers, but make less than $5k. I also receive research grants sometimes ($5k-$15k). In 2008, I will only have been in the country for 2 months and will have an income of less than $5k. In 2009 and 2010 I will be be back on the normal track with $1600/mo. and some loans with perhaps 2-3 months of a travel grant of ~$6k. Him: working person making a good salary (floating around 6 figures) New factor: baby on the way at end of year (will be on Dad's insurance and Dad's company covers childcare) The way that we see it, here are our financial options: (1) Stay unmarried, he claims baby on his taxes. (2) Stay unmarried, I claim the baby on my taxes. (But would this screw up my student loan/financial aid eligibility by making me look richer?) (3) Marry and claim kid together. (Again, would this screw up my student loan/financial aid eligibility?)