question for salt water GURU'S

[spicoly]

hi i'm new at this and would like some help on a protein skimmer. I am thinking of picking one up for a 125G tank.  I would like it 2 be a sump set up one. I would like it 2 be a plug and play model because i tried 2 build on about 5 years ago and the *#>< thing didn't work so not going that route again.  I was looking at the berlin XL turbo for about 500 and that's alot of money but it had a pump as well not decided about it. does anyone have any sugestions on this mater plz. like. What kind is better or something and where could i find it. tks in advance.