I’ve never had a MAC but my boyfriend loves his. My recommendation- go to Staples or Best Buy or some other computer specialty store and get an HP computer- if you get one without all the frills (i.e. gaming, etc), it will most likely cost you around $800.00 (some may cost you less after the rebate). Make sure the battery life for each use is adequate for your needs, had a DVD/CD player, and I would recommend windows XP (most are Vista, but they will load XP for you. Vista is not sticking around, from what I understand).
Remember, you use this as a business expesnse too, so it will pay itself off.