have used both the sgm giotto wash 400's and mac ranges.
for the wash 400's [the model i used]
i suspect they are are capable of a larger throw than the mac 250's. but i havent seen their beams side by side.
i used the giotto w 400's for a month of 18 hr days and had no trouble with...
if you want to do the colour flashes as described earlier, you will probably need to stack up a pair [at least] of gel streams in the positions you use - then when the change sequence comes, you can line up the next colour as one is one. with some loud music, it can be done pretty quickly and...