I've never heard of remoras being loud... and i've had three...
I'm kind of wondering, however, why he's planning to get a remora if he has a sump. He can spend less, and get way better skimmers.
a NW110 (octopus) is cheaper, and with a mesh mod it's a monster for a smaller tank, and an aquaeuro 135 is right there in the price range...
All I'm saying is that Remoras are great skimmers, no doubt about it, but they're great skimmer for their application--hanging on the back of a tank. Sure AquaC makes sump skimmers, but if you call AquaC they will tell you there is no difference in performance in the remoras and the urchins.
Look into an octopus NW110 OR the 4" recirculating for a few dollars more (my personal choice)... I think you'll be much happier with those in the long run, and they are more than capable of following you to a larger system, something you should always look for when starting out in the hobby.