I have a macbook (pro), and it's great!
I'm signed up with about 80 different companies, and I have never had a problem with Safari with any of the companies. Of course, Firefox is generally more widely accepted, but you can always download it for free. I use Firefox as a backup for the rare times that a website hasn't accepted Safari.
Another awesome feature about my Mac is the automatic spell-check. I can't tell you how amazing it is that everything I write is automatically spell-checked just like it is in Microsoft Word. I'm not sure if that feature is standard with Macbook Pro's or if it's an add-on, but for shopper reports, it sure is amazing!
And definitely get the laptop! Again, I can't tell you how great it is that I can take my computer with me to a shop, sneak off to a nearby coffee shop with WiFi and get the report done immediately. I've found this to be a life-saving feature, because information tends to leak out of my brain as I drive home.
And the Macbook Pro's are super fast and have a ton of memory. I've never once had a problem with mine.
Long story short, Apple laptops are awesome. They take a while to get used to, but they're worth it!
The Pro is a little more money than the regular Macbook, but it would probably be worth the investment in the long run. Nonetheless, the regular is still just as good as the Pro.
Sorry I got so ramble-y. I just heart my Macbook, and wish to spread the joy. =)