Marineland is a good brand, but the SeaClone is a not a good model for your tank size. Marineland dramatically overstates the size tank that this skimmer is good for. Now, you want a sump model skimmer. If you are a Marineland fan, they do make a nice in sump unit:
Marineland Pro In Sump Protein Skimmer 300 Marineland Pro Skimmer
Here are some other options that I would trust also:
Red Sea Berlin X2 Turbo Skimmer with Pump
In-Sump Protein Skimmer - G3 - 250 Gallon - 25 in. high | Venturi Models | Protein Skimmers | Aquarium - ThatPetPlace.com
Octopus Needle Wheel Skimmer - Large - 8 in. | Venturi Models | Protein Skimmers | Aquarium - ThatPetPlace.com
You should look closely at the dimensions of each of these skimmers and measure the space you have available. I personally use the ASM G3 on my 180 FOWLR and have been happy with the performance. Each of the skimmers listed above has a good reputation in the hobby, for a low cost skimmer. I have personally used or seen each of the above skimmers in use, and would personally feel comfortable with any of these.
You can spend $500+ on a skimmer to achieve spectacular performance, but I have always had success in the price range of the skimmers listed above.