The 7500 is the better card out of the 2 you are considering , it offers newer technology and it is flat out faster than the original Geforce 2 GTS cards.
It is faster than the new G2 Ti200 cards with the shrunk die, and it is almost equal to an Ultra in speed although just behind by a few fps. The overclocking potential of the 7500 has been very good, I have got to a best of 342/560 and MYKEX another board member has his at 344/606 I believe, over default of 290/460. Performance I think is limited after a certain point anyways and the performace gain is minimal after a certain point. Most retail cards will hit 340/570 bringing the biggest gain
The big benefit of the card is that it will provide you with MUCH better 2D and in my opinion 3D video quality/detail. I will post a link that gives comparison images where you will notice the difference. (gota find this review , give me a bit)
7500 also offers TV out at 1024x768 with HDTV support and dual monitor support. It is also very overclockable card, default is 290/460 with 4 ns ram on retail versions. I would recommend the Powermagic retail version of the 7500 for price and to make sure you get the same clk/mem speeds as the ATI retail version. Here is a link and it can be found for $119 online at
www.pricewatch.com
http://www.digit-life.com/articles/pmradeon2/
Another review is here
http://www.sharkeyextreme.com/hardware/videocards/article.php/932821
Dissolved made a good point, but the G4 cards will not be out for more like 2-3 months and you need the card now. I would say the G3 Ti200 will not come down to $100 in price cause that would push the nvidia G2 Ti200 series down to like $50-60 , I just can not see that happening right away. I think the G3 Ti200 price will remain pretty constant for a while.
So between the 2 cards you have considered I would take the 7500 hands down, you get the extra 32 ddr and you get newer technology vs older technolgy, better video qulaity, dual monitor, TV out at 1024x768, most cards are stuck at 800x600 still plus great hardware dvd support, plus support of some DX8 features but not all.
Also Powercolor has a Radeon 7500 Ultra for $105 US
here are the specs, clk is at 270 vs 290 by ATI but mem is the same at 230, specs do not say the rating of the ddr ram that would be a question to ask
http://210.66.3.2/web/product_inside.asp?prd_id=BRadeon7500PRO
I have also heard good things about the OEM Original ATI cards they just do not come with the extras but are clocked just like retail and sell for $119 as the powermagic does, check page 2 out at pricewatch under video cards and search for ATI Radeon 7500.
This shopuld give you some info to sift through and you should see the Radeon 7500 is the better buy of the 2 you are considering.
Cisco Kid