Yes, even the cheapest plasma will still put out better contrast ratio than the best LCDs. Ok, an LG plasma may not claim such feat, but it's an easy fix with a black tweak.
The Samsung F5300 is a good model. It has decent black level, adequate calibration options, and good enough brightness for a plasma. Power consumption & heat output wise, you shouldn't expect a big improvement, but I personally find them non-issues.
The 60 inches one you're looking at uses pentile-array though. If you don't like it, you can get the 51 or 64 inch ones instead.