Karl's rental is a great place for party rentals. They generally offer many different items at various prices. For instance, If you are looking for chairs they offer anything from cheap plastic ones to fancy, fabric (and expensive) chairs and everything in between.
One thing to keep in mind, if you are ordering particular colors or types of equipment, check and recheck with them to make sure that it is written down EXACTLY how you want it. We had a small mix up with a tent (we wanted white, got red and white stripe) they made up for their mistake, but we were still stuck with the tent because everything else was out.
With that exception, it really is a great place for rentals with good prices and delivery!