sounds like a not great IG list. I never have a list with less then 5 chimeras, use one normal IG slot (command + 2x inf + special weapons teams to put in valkyries) and the rest vets (bs 4, 3x special weapons) + command HQ squads (4x specials) all in chimeras... psyker battle squads, 3x valkyries, 2x2 hydras, 1x3 griffon... pretty killy.
also basilisks are pretty weak, BS 3 IG w/o transports aren't a good investment except as bubblewrap to protect your tanks. Hydras can wreck bike nobz and griffons re-roll scatter, so they do well as anti horde. valks with pods can move and fire 2 str 4 blast a turn, keep their save and stay away from most of your guys. three of them is a pain (though i run 2 ven's normally).
you have a pretty good list though. might want to consider the big mech KFF for 5+ saves on tanks
lootas are strong, nobz bikes w/ wound allocation is strong, gaz w/ megas in a BW is strong (or burnas in a vehicle). oh yeah, deffrollas.
DE is probably the best overall right now (though they die fast), then IG/space wolf... BA are great above 1500 points, but have two really bad matchups that didn't exist when they came out (DE/GK). Orks are probably the next on the list. DE have retarded firepower and speed... and no defense.
as far as game systems, netepic wins
its easy and makes sense. i like 2e WH40k a lot (and necromunda), since i started there, and VOR is pretty good and more open ended... and their version of tyranids can actually kill tanks
. I have a full set of chainmail 2002, but its a bit eh for me.
I guess I'm stuck in 1997, even though I was, like, 14 at the time.