Wlad is definitely #1 contender right now. Who is No2 and No3 who may fight Wlad next to reestablish linear title? Is it still Peter or maybe Ibragimov or Chagaev or Maskaev?
The linear is vacant. Despite his poor showing against McCline, Peter still won, so I reckon Wlad and Peter need to fight to officially settle matters.
Chagaev and Ibrag are the #2 and #3, respectfully. Chag gets underrated a bit, he did win his title by handing Valuev his first ever loss and he beat the mighty Ruiz. If Wlad unifies with one of these guys, or better yet beats them both, he is the linear champ by virtue of the #1 vs #2 criteria. No need to involve the Maskaev-Peter-Vitali We Be Crooks sideshow that's going on atm.
Wladimir Klitschko vs. Samuel Peter 2 would establish a Ring Magazine champion, but the problem is most fans (including myself) don't think Peter is number 2.
Peter v Chagaev is where lineal is at. That is the unification of the WBC and WBA. Wlad is considered the best though. Whoever unifies those belts has to defend against the IBF and WBO champ anyway because they'll be considered the next best fighters.
He beat an unbeaten fighter for his title and a few goog contenders (Ruiz, Virchris). He has looked the best as well. Ibragimov hasn't beaten great competition and has a draw with a fighter that Wlad never threw a right hand against and still stopped him. Peter has already lost to Wlad, hasn't beaten a top 10 HW and while he won his last fight, it was not a great showing.
Peter has beaten a top 10 heavyweight - James Toney was ranked there both times Peter beat him. Although I guess you could say he has never actually beaten a top 10 true heavyweight.