Hey there Briney11!

There's no doubt that Xmart bikes rule in the mass marketing of bicycles. Recently, their drivetrains have gotten better. So much better in fact, that they're beginning to mimic the lower tier drivetrain components on the traditional bicycle, sold by the big three independent companies, not too many years ago. IMO, if any of your components should fail, replacing them with higher quality components could quite possibly extend the practical utility of your Xmart bicycle by years.

Therefore, before making your choice between the Denali, the Genesis, the Admiral, or any other of these mass produced Xmart bikes, just make certain that you read the reviews and research their drivetrain components. IMO, though the mass produced bikes are getting better at mimicking quality drivetrain components, you simply can't trump the dependability of a single speed.

However, like @TransitBiker has already stated, you just can't beat a quality used bike in mint condition. This would be your best bet. Problem with that is, you simply must either be bicycle savvy yourself, or you have to have someone else who is knowledgeable, accompany you on your quest for a good used trustworthy bike. Otherwise, you could get duped!

* In 2012, 75% of all bikes sold within the U.S. were mass-market produced Xmart bikes.