Way agreed, you can recoup your CD money in 4 years while it would take 5.5 years to pay off at 2K a month. As far as the tax savings, you will not realize 6K off your taxes just off your gross income so even if you pay a little higher taxes it shouldn’t equal 6K.
On a 100K income with no other itemized deductions there is no extra tax savings because you would take the standard deduction.