Only concern for me with Eric Gordon is he's turnover and injury prone. Other than that I'd love to have Gordon here. Efficient scorer and a good defender. I don't know if he'll want to be here though.
As for Roy Hibbert. This is just me, but I'd really rather have Spencer Hawes.
Although Hibbert is a better post player, they pretty much boast the same production. Hawes though, is a couple years younger, and has a year more experience (he's shorter than an inch and lighter than 15 lbs though). Hibbert can hit those elbow jumpers, but so as Hawes and can actually extend his range to 19-20 feet, which if used right could open up space for Rondo to operate, assuming we still have him. And most importantly, we can probably get Hawes for about a million or two cheaper than Hibbert is. I don't know why but i guess maybe because Hibbert is being liked more than Hawes. But I'd really rather have Spencer Hawes instead.