Nrenter, philosophically it sounds great, realistically and practically when the real numbers are crunched the benefit of running the mortgage to the max (ie.30 years in your statement) and having that extra cash now in the form of reduced payments (presumably to invest elsewhere) plus the tax benefit is more times than not a push when everything is said and done. Sure one can look at various times in the real estate market where prices rose an unstable or short term levels. However, these are anomolies and typically are addressed with corrections. Even with a 6% rate, the tax benefit + the freed cash benefit - the additionally paid interest is not a significant reward when comparing to a 15 year mortgage at the same rate.
Of course, I also live in an area where real estate values (house values) have dropped an average of 11% over last year and this yea (projected, with one month to go).
I just see too many people overbuying on houses and squeeking into mortgages thinking their house value will skyrocket only to realize 4-5 years later that they are almost upside down and sinking quickly. I have lived in my house 7 years and owe less than 50% of my initial mortgage amount, 35% of the houes current value and will owe nothing on my house the day my oldest child starts college. A mortgage is still the one item I feel financing is a good thing, partially because it holds its value with a moderate chance for increased value after deducting for all related costs of ownership in most markets in the country.
Financing audio equipment, $80,000 cars on $150K incomes when the car is worth about $50K as soon as it is driven off the lot, etc. . is not good financial management. Sure one can "afford" it but that doesn't make it a sound decision. I am not opposed to spending money on things we love, enjoy, etc. . . I have owned my Porsche, boats, wonderful trips/travel and too much stereo equipment (all of which in terms of stereo equipment I have purchased with cash over the past 18 months - Wilson Watt/Puppys, Mark Levinson and BAT Amplification, BAT Pre, Audio Aero Capitole CDP, etc. . .)