Selling MMS, reducing positions in AMBA, KORS and UTHR

The main reason for selling these positions is the insufficient cash in my portfolio, because I am purchasing two new stocks today. It's always a very tough decision to sell a stock, especially if you held it a longer time and it delivered great returns. And it gets even tougher, if you are trying to replace a great stock with an even better one. Maximus is a good investment, but others are too, in fact I think they are the best stocks to buy right now. But the technicals are not very favorable for MMS, the uptrend is not  broken yet, but as someone once said, you have to get out while the getting is good. I have sizeable positions in AMBA, KORS and UTHR, so I'm reducing them a bit and buying 2 new growth stocks with high upside potential.