If you can afford it, buy the bike you really like... you'll be a lot more likely to keep riding it! As for repairs and maintenance: you can expect to need a tune-up after a month or so of riding as cables stretch and things get broken in... after that, assuming you're reasonably good about routine lubrication and things like that which are really easy to do yourself, you probably won't need a WHOLE lot of work - certainly not enough to be the deciding factor.
Fit, comfort, and simple bike lust are the most important things. If the Del Sol is comfortable and is the one you simply *like*, go for it! At your price point, quality of the bikes is going to be pretty much equivalent no matter which you choose - assuming decent fit, you really can't go wrong.
