Is a stroker crank really worth it?

i was looking at some stroker cranks though, and i was wondering, is it really worth it?
1.) how much stronger are they?
2.) how much higher (supposing everything else is top notch) can they rev?
3.) what extra work is required, and in your opinion, is it worth it?
thanks alot guys...i've been out of this ls1 comunity to long

later
matt
will likely go with 4.125 crank for big cubes and a NEW stock LQ$ blolck...the cranks are really expensive now, however.... perhaps they will decline in price soon????


