check this sticky, the drop-ins have already been tested for real out the front lumens..
http://www.candlepowerforums.com/vb/showthread.php?t=229135
The Malkoff only makes about 35 more lumens out the front, but the beam quality is 2nd to none. It will illuminate with a good amount of spill and a super tight hot spot with no artifacts or donut.
The Solarforce Q5 is good because at least you get what you pay for, but the beam quality is just like any DX Cree Q5 ro R2.
Here are the lumen readings taken by MrGman.
Solarforce R2-S______________202___________________3 RCRs,_____________Browning Black Ice 3 cell host.
Solarforce R2-5M low,__________37___________________2 primaries___________Surefire 6P host_________,
Solarforce R2-5M Med,_________85___________________2 primaries___________Surefire 6P host___________,
Solarforce R2-5M High________160-155________________2 primaries,__________Surefire 6P host__________,
Solarforce Cree R2-S_________210____________________2 primaries__________Surefire 6P host___________,
Solarforce Cree R2-S_________190____________________2X17500 LI___________Solarforce L2 Host 1 extension,
Malkoff M60________________231__turn-on____________2 primaries____________Surefire 6P host_______________,
Malkoff M60________________220__warm,_____________2 primaries____________Surefire 6P host_______________,
Malkoff M60________________235__turn-on____________2 AW ICR123__________Surefire C2 Centurion host_______,
Malkoff M60________________218__warm _____________2 AW ICR 123_________Surefire C2 Centurian host_______,
Malkoff M60________________276__turn on____________2X17500 LI____________NO BEZEL Solarforce L2 +1 ext.__,
Malkoff M60________________245__warm_____________2X17500 LI____________NO BEZEL Solarforce L2 +1 ext.__,
Malkoff M60________________240__turn on,___________2X17500 LI____________w/nonCren BZL Solarforce L2 +1 ext.
Malkoff M60________________215__warm_____________2X17500 LI____________w/nonCren BZL Solarforce L2 +1 ext.
Malkoff M60________________212__turn-on____________2 primaries____________Solarforce L2 host_____________,
Malkoff M60________________202__warm_____________2 primaries_____________Solarforce L2 host_____________,
IMHO: Eveyone deserves to own a M60 because the beam and the build quality Gene puts into these is a true work of art.