I have the 750 watt from HF. I bought it to run some sound equipment for my brother's wedding on the beach. It worked fine for that. I've run a halogen light on it a little bit as well. I've not really used it a great deal but no issues.
http://www.harborfreight.com/750-watt-c ... 66817.htmlSince you don't need one right this minute, I would likely get the one from Amazon. It has a lot of good reviews there and some good reviews here. If I needed one right now I wouldn't have any problem with the HF one.
I also have a small 75 watt one from HF that we have used a great deal for a few years to run a DVD player in our mini-van and to charge game devices etc. It has worked well but is a little noisy. Our 12v plug for the DVD player quit working and it was cheaper to buy the inverter and use the 110v plug than to buy a 12v plug and it would also serve other purposes.
I have also used the small one to run a CFL light when camping.