Hosting

Hello. I would like to consult with you about choosing hosting. You recommend selecting http://it-patrol.ru. I have my eye on the fourth tariff there. The site is expected to have 400-600 visits per day; what should I pay attention to when choosing hosting? Also, some hosting providers specify dedicated memory of 128 or 192; how does that affect performance and how much is allocated on http://it-patrol.ru (if known).