The ratings on this site can be rather deceptive for some odd reason - or maybe it's just the players general 'game state' of the day that varies, I know mine does anyway.
Anyway, I'm also interested to know how you guys filter your seeks? I usually go 0 below and 2-400 above, depending on aforementioned state.
Tournaments are good you get a decent mix of rated players. Having had a few recent breakthoughs in my game I like having a good dozen or so games going of -100 rated games. I can try out a slew of canned tactics this way and it also solidifies my tactical speed. Conversely playing to a higher opponent and it is soon very apparent any "problems" I may be having with a particular opening.
So even the way we choose our opponents is a tactical decision, chess is life
gee, that's really freakish. They were an amazing pop group with a unique sound, blending electronica, tight vocal harmony and lots of energy... very sad he has gone.