Here I go ... I know I am gonna get flamed ...
Hey Dartley, if you're into a coupe (2 door) then you should take a look at the Honda Accord V6 with all leather and power everything. Great gas mileage and they hold there value and once you've driven it you'll throw rocks at that Stang. I know, my wife wanted a Mustang and we drove both and bought the Honda. It was a hands down winner no contest. It's quiet, smooth, goes like stink, great brakes and handles like it's on rails and did I mention power everything.
Terry
If the new Mustang had a Mopar badge on it, and was as good a modern interpretation of a Duster or late 60's Barracuda, with a 300 HP 22+ mpg V8, 5 spd overdrive, etc, all capable of high 13 second ETs stock, and with a large aftermarket parts base, would you choose the Honda over it? ... I sure wouldn't.
The resale value on Mustangs - 5.0L up to date - is better than any Honda, and after 15 years ... way better. I see fair to good cond late eight/early ninty 5.0s still going for 3-5 thousand. Accords, once over 10 years old are just old cars - a 20 year old Accord - if it isn't part of the soil again - isn't worth anything - few hundred maybe, unless it's California clean.
But a large part about the Accords is that I don't fit in it. I am not an especially large guy, but I've sat in the last gen Accord coupe`. I obviously can't comment on the redesigned '08 and my head was constantly brushing the interior of the roof and no adjustment would compensate. So it's out right there. I had driven the last gen Mustang, and did not buy it principally for the same general reason of poor ergonomics ... not the roof this time, but rather the location of driver necessities; to reach the shifter w/o getting feeling like I might dislocate my right shoulder, my knees were up knocking against the dash - and again, nothing would compensate for it. So that was out. I have no idea why, but the 5.0L up to '92 were a better fit than the '93 to '04 models, could just be the dash and seats - dunno.
I drove the current Mustang and it it's a good fix ergonomically for me - vastly improved over the Fox body version.
I have driven the 4-dr Accord and it's comfortable - the extra headroom makes the difference. But now we're talking V6 family car vs V8 coupe` ... just not a good comparo. I would consider the Accord if I wanted a 4dr - it's a nice car.
One more thing, and again this does not apply to the '08 redesign; I did not like the looks of the Accord coupe`. That's a personal thing and I mean no disrespect to you for choosing it, but I personally do not like it and neither did my wife.