Replying to Would these skis be too big for me?

Hey guys, just a question before I make any purchases. So I have a guy offering me a pair of 187 Liberty Helix skis, good price with bindings. Almost exactly what Im looking for, but theyre a little longer than I was looking at originally. I currently ski some park skis at 178, and just wanted to add a bit fatter ski for all mountain/groomers/powder when Im out in colorado. Im 5'10", bout 177 lbs, really athletic build. Pretty advanced skiier, when I go out west I dont do much park, I charge hard, ski some steep stuff, occasional chutes and whatnot, trees, the like. So would 187's be too much for me to handle? Just wondering, I havent really ridden skis that long before so Im unsure, highest Ive demoed is 182's and those were fine.