I have the Epson DS-560 which is wireless, fast and reliable with large packages. I am thinking about getting a second one for in my car. I reccomend this one.
As for subscribtion to a fax service? I no longer have one, most companies allow you to email and when they request a fax like on purchases I can do that from the real estate office. Only once did I need a fax at my home office and used fax fresh, if I needed it more often I would probably look seriously into this again.