In my mind, once you're playing with other people (as opposed to just lacing up and shooting around by yourself) you want something sturdy. First of all for safety, you don't want something breaking down on you and sending you flying. Secondly, for durability, because the nature of playing with other people pushes you more, and by default it pushes your equipment more, so the wear and tear is magnified. Others might disagree, but I think decent skates are a worthwhile investment if you play a couple times a week.
If you're looking for a new skate, honestly any other skate in the same price range as the RSX is probably better. If you go up to 300 you have the Fz5 or the Tour code 2.one, revel3, x2.7. Or for the same price you can get a decent used skate. I wouldn't put another dollar into the RSX boots because I don't trust that they would hold up at your weight even with better frames.