I find that 19" crt monitors on the whole tend to have rather CRAPPY geometry. I have tested just about every flat tube monitor out there and some have pretty good geometry (sony f400) and some have some rather crappy geometry (low end samsungs and viewsonics). I made the switch to LCD recently and haven't looked back.
Perfect geometry, razor sharp text, 25ms response time and no noticeable blur whatsoever. Sure it costs a little extra, but it was well spent.
At this point in time i actually would recommend a CRT monitor over an LCD though. Newer technologies are on the horizon that will lower the response times of LCD's to achieve much better gaming performance. I say get yourself a Sony G400, F400, or G420 ( all had excellent geometry, color, and clarity). I found Samsung monitors to be rather inconsistent with one monitor performing better than the other or far worse than the other.
All of these monitors can now be had for under $400 easily, with some coming down to $200 and below. So to sum it up, get a sony.