As a car salesman, I sold these for years, and just purchased one for myself. The 2000-2007 Monte Carlo was a standout in the GM lineup, and used models are a bargain in SS trim (avoid base models). The car, unfortunately, was misunderstood -- witness the reviews here. It was really one of the last "personal luxury" cruisers -- stylish, extremely economical with the 3.8, roomy, and as powerful as it needed to be. A better performer than most 4-cyl cars, cheaper to operate than many, cheap to repair. If maintained, expect 200K-plus miles. Only drawback is the endemic GM midsize steering shaft problem, which can be solved cheaply ($5 or so) with DIY lubing. A wonderful car, a classic.
2-door styling. SS model offers full luxury and sport handling, long wheelbase gives smooth ride. 200 hp in 2000-2005 SS models is plenty; GM's 3.8 motor is one of the great all-time engines for power and fuel economy (30- plus mpg on highway -- no fooling!) Used models with less than 100K are cheap!
A little late for this, since the car was dropped after 07 model year. Would have been nice if GM solved the steering-shaft problem once and for all, but regular maintenance takes care of it. Advice to prospective purchasers -- this problem is no big deal; every car has quirks and this has very few.