Don't think about overclocking any of those monitors. Its only the Catleap 2B that were overclockable. Unless you want to try to find one used, you won't be getting one new.
Anyway, I got three CrossOver 27Q Led-P and I am amazed by the quality of them. I have no dead pixel or stuck pixel.
I heard the CrossOver have the lowest percentage of dead pixel.
Its a very robust casing and you have a heavy duty Stand/Pivot, you can set your monitor the way you want: horizontaly or vertically.
I bought them from Red-Cap.
Little info about the Yamakasi catleap Overclockable Model
OC vs. Non-OC Monitors
OC vs. Non-OC Monitor Internals (Click to show)OC Monitor InternalsDVI PCB W/SPEAKER
MODEL #: HY-2560M_DA_Q1.REV.4
CENTER PANEL PCB (CONNECTS TO DVI PCB)
MODEL # LM270WQ1-SLA1
P/N: 6870C-0340A_REV0.2
DESIGNED: 2010.04.06
RIGHT TOP PANEL PCB
MODEL # LM270WQ1-SDA2 SOURCE PCB(R)
P/N: 6870S-0922A EVT2 REV0.4
DESIGNED: 2009/05/06
LEFT TOP PANEL PCB
MODEL # LM270WQ1-SDA2 SOURCE PCB(L)
P/N: 6870S-0921A EVT2 REV0.4
DESIGNED: 2009/05/06
Non-OC Monitor Internals
DVI PCB W/O SPEAKER
MODEL #: HY-2560M_DP REV_02
CENTER PANEL PCB (CONNECTS TO DVI PCB)
MODEL #: LM270WQ1-SDA2
P/N: 6870C-0301A_EVT2_Rev1.0
DESIGNED: 2009.05.14
SEE THIS POST FOR PICTURE OF CENTER PANEL PCB - CLICKY
RIGHT TOP PANEL PCB
MODEL #: LM270WQ1-SDA2 SOURCE PCB(R)
P/N: 6870S-0922A EVT2 REV0.4
DESIGNED: 2009/05/06
LEFT TOP PANEL PCB
MODEL #: LM270WQ1-SDA2 SOURCE PCB(L)
P/N: 6870S-0921A EVT2 REV0.4
DESIGNED: 2009/05/06
HERE IS A SIMPLE BREAKDOWN OF THE DIFFERENCE IN PICTURES (WE ALL LOVE PICTURES - SORRY NO POP-UP BOOK VERSION)
Pictures of OC Monitor Internals (Click to show)Here goes all the pics from an OC monitor.
RED for the PCB to the panel, BLUE speakers, YELLOW to brightness/volume/power, PURPLE to panel. THIS IS THE DVI TO PANEL PCB.
UP CLOSE OF SN ON DVI PCB
FULL OF DVI PCB - CABLES WOULD NOT COME OUT EASY AND I DIDN'T WANT TO DAMAGE THEM
BACK OF DVI PCB
UP CLOSE OF DVI PCB TO PANEL PCB CONNECTORS - THESE ARE NOT THE SAME AS ON A NON-OC MONITOR
RIGHT SIDE/TOP OF PANEL PCB
CENTER PANEL PCB - THIS IS WHERE THE PCB DVI CONNECTORS PLUG INTO (UP CLOSE SHOT BELOW)
UP CLOSE OF CONNECTION TO TOP PANEL PCBS
UP CLOSE OF CHIP
HERE'S THE MAIN DIFFERENCE BETWEEN THE TWO PANELS - THESE ARE THE CONNECTORS THAT LEAD TO THE DVI PCB
LEFT SIDE/TOP PCB ON PANEL
SN on the other PCB is 68705-0922A rather than 68705-0921A and is "SOURCE PCB (R)" instead of "SOURCE PCB (L)" - this is the left side of the monitor when it is flipped and you are facing it.
Im jelly 
