Moving up the limits: 10NL -> 25NL

Well, now that I have a good bankroll to play 25NL, and since I don't have a problem dealing with 10NL, I figure it's time to move up. I usually play full ring, up to 4 tables. For the ones who play there regularly, are there any major differences between the two? Are players significantly better, capable of making good bluffs and light 3-bets? Also, are FPPs easier to obtain? It's a real pain earning those in micro stakes...

Oh, and I only play 4 tables because I don't have any more free space on the monitor. I think I could handle something like 6 right now, since my game isn't much read dependent, I just play tight poker, seems like the best way to handle these limits. How many do you guys play? And if you play more than 4, do you have a problem putting some tables over each other? I kinda like to have an eye on all of them, but give me some tips... any help will be appreciated.