If I might add my $0.02, I'd go with whatever degree you're most interested in. If that's money, do some research to find what each job is paying. Hopefully the money isn't more than 50% of your job choice though
As for the range in developer salaries, it varies (of course).
Government pays the least but has best benefits (vacation, never more than 40 hours/week). You're probably looking at $20k - $30k for entry level (just a guess). Otherwise you'll probably be a tad higher, maybe $25k - $35k. If you have 2 or 3 years experience, your salary could jump significantly, depending on what you pick up (experience, experience, experience). A jump from $25k to $40k after 3 years isn't out the question for instance. At 6 or 8 years, you could be looking at $60k or $70k, then again maybe just $45k. A lot depends on the company (type of work, size, etc.).
Another big factor is location - California can make about 80% more so your $25k is closer to $35k or $40. But try to live on $35k in California where a studio apartment is $1800/month and you have to wait 6 months for one to open up...
I can't speak for MIS degrees, but I know that Business Analysts and Project managers tend to make less in the beginning than developers. If you're good (and there are surprisingly few ones, that I've seen), you could jump MUCH higher. The really high salary comes from contract work, for both MIS and Developers. It's not as stable, but could easily pay $50/hr or more which comes out to $70k or more in salary... (you have to buy your own health insurance, and you may only work on each job for 3 to 6 months).
-Nerseus