Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
I too got fed up with all of thr pc issues and bought an imac. My intentions were to start to learn the mac side but that has not been the case. I installed VM fusion and windows XP pro and have not looked back. We run accurip, a brother GT541, epson 1400, scanner and basically everthing we need.
If you plug an external HD into an iMac, it should just recognize it and you're good to go. If not, there is something wrong with the HD, at least in my experience. I just had to get a new one at home as my 7 year old one had it's power supply go. I got the new one, took the drive out of the old one, hooked it up to an old external PS I had, and it was instantly recognized by the new iMac. Pretty easy stuff.Steve