Well I have my 100% on Xbox, and will get it on PS3 when cheaper
As for insanity, other than the start of the game, I found it all rather easy, as I felt I was effectively cheating with tech armour as an infiltrator. And once I got a sniper rifle, I was nearly undefeatable, it was just awesome
My plan is to play both through on my PC, then get the PS3 version in the summer or something, platinum that, and then move back to the 360 games, to finally get 100% on ME1 (with a couple more playthroughs) before playing ME 2 some more so that I have done everything with both my characters