defiantly go spartan, they get there lasers direct from cni. the quality will be leaps and bounds better than LVYI. i've never heard of LVYI but you know what your getting with DL.
a search of the forum for "class IV red diodes" has yielded 1000 results. try the extra effort of searching next time.
edit: qumefox beat me
edit again: post 200 woot. sorry off topic but still