Is build 1 really needed or is build 2 sufficient?
How long will these computer last?
Is something not good with these builds?

Please advice!

--- Build 1---
Processor: AMD Athlon 64 X2 5400+
Internal memory: 2048 MB DDR2 SDRAM
Harddrive: 2 x 320 GB, SATA, 7200 rpm
Extra HD: 300 GB USB 2.0 (UATA)
Optical unit: DVD, 16x max
Optisk unit: DVD±RW/±R/R9 (2,4x/16x/4x/12x/24x/10x/32x max) with
Lightscribe, Dual Layer
Graphics: nVIDIA GeForce 8800 GTS, PCI-Express, 512 MB DDR
Sound: Creative Labs SoundBlaster X-Fi (motsv Xtreme Music)

--- Build 2---
Processor: AMD Athlon 64 X2 4200+ (med dubbla processorkärnor)
Internal memory: 2048 MB DDR2 SDRAM (667 MHz)
Harddrive: 250 GB, SATA, 7200 rpm
Extra harddrive: 160 GB USB 2.0
Optisk unit: DVD, 16x max
Optisk unit: DVD±RW/±R/R9 (2,4x/16x/4x/12x/24x/10x/32x max) with Lightscribe-teknik, Dual Layer
Graphics: ATI X1650SE, PCI-Express, 512 MB DDR