I'd go V5 with HSR drivers (just as fast as GF2U with the HSR, FASTER with FSAA + better 2d+3dFSAA). For a sound card, an SB Live! 5.1 (X-Gamer, MP3, etc. the only difference is software bundle) is great. DO NOT OVERCLOCK THE ATHLON! IT WILL BRING YOU NOTHING BUT HEADACHES, AND IT VOIDS YOUR WARRANTY ON MANY SYSTEM COMPONENTS.
By June, a GF3 will be available (too pricey, $600), a Radeon II (unknown price, speed should be awesome along with features though), a 1.4-1.6ghz Athlon (unsure still), ultrafast CDRW/DVD drives, and possibly even affordable DVD-RAM drives (unlikely, but possible).
I'd swap the PC133 RAM for some Crucial DDR 2100 RAM (look thru threads, they DO carry it and it works on all motherboards, it is hidden; but it will be available normally anyway by June easily), as it will give a 10-15% overall system performance increase. Otherwise, everything is pretty good .