Originally Posted by
daihard
Trek is a reputable manufacturer - probably the biggest in the U.S.
I'd also consider the Trek 7.2 FX. The DS is geared more towards off-road (with thicker tyres and front suspension). Unless you spend a significant amount of your ride time on dirt, the FX should be able to meet your needs. The upside of the FX is that it's lighter and more road-oriented. Just my 2 cents.
The DS 8.1 shares the same fork as the 7.2 FX and the tires are only 3 mm's wider. I doubt you would notice any difference. The biggest difference between the 2 bikes is the wheel base and saddle to handlebar distance. The DS is about 4 to 5 cm's longer.