Its all opinion, so not going to say your wrong, but will disagree with you. As evidence when you played us Scholes had an obvious off day, and we bossed the midfield, which is why we won. To me that was the difference on the day.
I'm not saying either Carrick or Hargrieves are bad players, they'd make most clubs starting 11 outside the top 4, but I'm not sure they are as good as Scholes in his prime, or what is on offer in the clubs that have a chance to challenge for the title.
Remember who your comparing with, Gerrard, Mascherano, Alonso, Lampard, Deco, Essien, Mikel, Fabregas. Maybe Hargrieves belongs along side these names, but lets face it his long term injury issues has to be a concern, and IMO Carrick while a strong player, is not quite at the same level. Anderson may get to that level, but he's got to prove he can be more consistent first.