I will mildly disagree, I can't tell the difference between the GF4 and radeon cards anymore in 2d or 3d quality. Nvidia has finally solved any of their past image quality problems. I am on my second Ti card now (have owned the PNY Ti4400 and now the Visiontek Ti4600, and know someone with the Visiontek Ti4200 and all three are great all-around cards with superb IQ and 3d performance).
I also think it matters on how long you are going to keep the card. You can't get a decent (atleast AFAIK) ti4200 with 128mb of memory for under 150, but you can get a good 8500le 128mb for 120. If you only upgrade once every 1.5 years+ then I'd say get the 8500le...with the way game trends are going I'd think even 1 year would make 64mb somewhat of a disadvantage....just my thoughts though
I would consider buying based on cost and which of the 2 cards is cheaper. LIke it has been said above the 8500LE is slower by about 10-15%.
But online you can find an 8500LE 128 DDR for like $99, to me that flat oiut represents a good buy. Odds are you will buy another card ina years time so why not spend less now. Just my opinion.
Yodums mentioend driver issues but I have not experienced that but then I do not play as many games as some on this forums do. The 8500 will give you better DVD hardware support over the Ti cards though.
Your choice both are good cards and both are overclockable!!