This is completly my opnion and I have no idea what "best" means but if I was going to get an intergrated amp I would go for a McIntosh, Cary or Manely. McIntosh has 3 really nice intergrated amps like the MA2275. Cary has 2 nice single ended amps like the CAD-300sei. If you want less expensive the PrimaLuna Prologue II is nice.
Good Luck
Good Luck