Basically I have a trusty Hansol 710D. Ok, so the image is a bit skewed (one corner out slightly), it pumps out tons of heat, and it gobbles up the electric...oh and it sometimes hurts my eyes when looking at bright stuff. Enough cons for you? 
I should have about £150 in a month or so, and I've seen the prices of 19" TFTs. I'm not sure if I could use a widescreen, but I'm going to go to shop and try one out. I've been reading that I should look for contrast ratios above 500:1, go for a moderate brightness level.
Now the thing that's going to get me, is the pixel response time. I like to play mostly FPS games - often with dark scenes, but not always. That's alongside the usual web-browsing, Photoshop, etc. At night, the monitor will usually be used to play movies - usually 16:9 movies, but I have some 4:3 amongst the 'collection' also.
From what I've read, some manufacturers have different ways of measuring response time - ie: grey-grey, back-to-black, and back-to-white. Is there any way of telling who has used which method to measure these times? Or is it pot luck? I suppose I'm looking for a 4-5ms or better response time - but I am open to suggestions and comments.
I will NOT be using the built in speaker in the monitor, if it comes with one. If it's £20 cheaper to buy a monitor with speaker with good specs, then so be it. Just means it'll never get used.
One more thing while I remember - bugs! How easy is it to get these swines out, should they decide my new monitor is a nice home?
I am not entirely bothered about looks of the monitor. I don't want to buy some monitor, just because it has a nice paint and plastics job.
Looking forward to comments, and what I should be looking to buy. I really can't afford to increse my budget much more than £150 - ideally, I'd like the budget to be kept to a minimum.

I should have about £150 in a month or so, and I've seen the prices of 19" TFTs. I'm not sure if I could use a widescreen, but I'm going to go to shop and try one out. I've been reading that I should look for contrast ratios above 500:1, go for a moderate brightness level.
Now the thing that's going to get me, is the pixel response time. I like to play mostly FPS games - often with dark scenes, but not always. That's alongside the usual web-browsing, Photoshop, etc. At night, the monitor will usually be used to play movies - usually 16:9 movies, but I have some 4:3 amongst the 'collection' also.
From what I've read, some manufacturers have different ways of measuring response time - ie: grey-grey, back-to-black, and back-to-white. Is there any way of telling who has used which method to measure these times? Or is it pot luck? I suppose I'm looking for a 4-5ms or better response time - but I am open to suggestions and comments.
I will NOT be using the built in speaker in the monitor, if it comes with one. If it's £20 cheaper to buy a monitor with speaker with good specs, then so be it. Just means it'll never get used.
One more thing while I remember - bugs! How easy is it to get these swines out, should they decide my new monitor is a nice home?

I am not entirely bothered about looks of the monitor. I don't want to buy some monitor, just because it has a nice paint and plastics job.

Looking forward to comments, and what I should be looking to buy. I really can't afford to increse my budget much more than £150 - ideally, I'd like the budget to be kept to a minimum.