hiya
ok here we go:
A. i use a cheshire. i dont know if lasers are any better or not, i have heard mixed reviews
B. although my scope isnt as big as yours i guess you could use similar EPs. the main ones i use are 15mm for DSOs and 7.5mm on planets. the 7.5mm is quite usable in everything but the worst seeing.
you might want to consider a good barlow, some star maps, a red torch, and a good seat.