Macs and Pcs are both good computer choices. You have to remember that, it’s not a black and white issue. So, before the flamewar starts, I’m putting up some fireproofing.
There are Pros and Cons for every computer, because not every computer fits every type of situation. I have used both Macs and PCs heavily in the past, and enjoyed both experiences.
Yes, Frontpage is available on the current Macs. So that should not be a major deciding factor. There are a tons of web site building software out there as well, so don’t be concerned.
Your business. What kind of software are you using to run it. QuickBooks, just some Word stuff, what? That’s VERY important to know to help you choose. If it’s a full business software thing like QuickBooks, check to see if it is available on the Mac first. You’re going to want to keep the software if you know it very well.
How much are you looking to spend? I know this does write into cliche, but you can buy some PCs cheaper than Macs. They might not have as good as service or reliability, but it is an option. As you don’t sound overly technically experienced (no offense), I’m not going to suggest you build your own computer.
Before you run out and buy a new computer, what’s wrong with your current one? I know the computer I use at work (it manages the entire business), is an old 512MB RAM, Pentium D thing. It can’t run anything advanced, but it can run the entire business. Have you put a firewall on your computer, an anti-virus, and a spam sweeper? Have you kept the system clean? To be honest, the problems you say you are having sound like you need to clean your system and de-frag it. That ALWAYS improves a systems performance by a huge margin.
What operating system have you been using? Because, to be honest, this the biggest thing. There ARE operating system differences between a Mac and a PC. And it takes about a week to switch between the two and get used to them. Personally, I like Linux more than both combined, but you aren’t going to want Linux. If you have been using Windows XP in the past, I would suggest ordering a new PC without any operating software, and just using your old copy. It’s a LOT cheaper that way, and you can do that with Dells.
I would advise AGAINST getting Vista at this point simply because it is too new. It’s bugs haven’t been worked out yet, and, while it is shiny, it basically does everything a Mac can do, but with a lot more issues.
If you want a Mac, go down to the Mac store. Ask an employee about what kind of computer you need, test it out on the store floor, ask about software, costs, and anything else that concerns you. They can usually answer anything and everything you need to know, and more.
I hope that helped.