Yes, in fact the BX is still considered by many to be the best chipset on the market. It will make your AGP 4x card run at 2x, but since 4x is so underutilized, the performance difference is very small.
I recommend the GeForce 2 GTS for around $140, or the Redeon LE for around $70. There are no cards between $70 and $140 that can perform better than the Radeon LE.
BTW, the Radeon VE and GeForce2 MX are both poor performers.
If you need TV-out, I recommend the Radeon LE TVO.
Cast not thine pearls before the swine