We have a Coralife 125 on one of our 44g tanks... for the $100, it's tough to beat... as Eric mentioned, after a 5-7 days the neck coated with gunk to the point it's almost closed off, when I take the time to dial it in it will fill the collection cup with very dark skimmate... I just take the lazier route and let it build on the neck and clean it every few days... so long as it is being removed from the water I don't care.

Haven't had the opportunity to play with the Excaliber brand yet, so have no first hand knowledge of it to compare.

Do you have room to run both? It sure wouldn't hurt the tank any, and might provide for some good comparisons.