hehe. They are right, 6600gt is very good, but I know what you mean, I have said that same thing and gotten the same responses in another forum. ANYWAY, (
) posting your specs would help for me/us to say whether the 5700 would play OK on your system. I know you didn't want people to tell you to get another (for you are trading your games for one,) but le editions usually aren't as good.
The 6200 is worth about $70, and depending on your PS2 game amount/type, you may be getting ripped off. Not really ripped off, but if you sold your PS2 games in a lot on ebay or something you could get more $$$.
Anyway, a 6200 will of course play HL2 pretty well depending on your other specs. Oh, if you are also looking for BF2 to play on that too, the 6200 isn't supported, but I THINK it still runs it.
As for the 5700le....it is more $$ than the 6200 and I am pretty sure not as good. Well there are about 2 cards that are about the same price as the 6200, but they are 64 bits which are slow.
Summary: 6200 is pretty good, I don't see anything wrong with getting it.