£ for £ plasma is 2-3 times better than LCD.
you won't find any brand new plasma's for £250.
so basically LCD is the only option.
second hand though you can pick up like i said a 42" PZ85B for under £150 which originally retailed for £1400 ish when brand new.
comparing a brand new £250 LCD with a plasma which cost £1400 brand new 5 years ago, which bare in mind £ for £ plasma is 2-3 times better means that even with newer technology, old plasma's still beat new LCD's hands down.
then you have to remember plasma's are better at motion processing, input lagg, etc. which makes them even better for gaming.
the only downside is Image Retention and £20-£40 extra per year in electricity bills, depending on your useage.
i'm assuming an extra £20 a year in electricity isn't going to financially cripple you so let's look at the IR downside. so long as you use varied content you should be fine, like also watch TV, movies, etc on the same set or not continually play the same game with the same menu or HUD system.
basically static images used continuously on a plasma are bad.
with varied content though it's not an issue, so for me it's not a huge problem, yes i do get IR from watching stuff like Sky Sports 1 HD all day long on a saturday or sunday due to the logo being constantly on screen but after a while it will go away so long as i stay away from that channel.
basically variety is key, the more you mix it up the less chance of getting IR, keep continuously watching one thing though and you get IR.