No modern or even old processor is going to be stretched by a bit of word processing, I really doubt you'll notice any difference between a sempron 2600 and an FX62, except in the amount of money left in your wallet.
For the type of system you say the need you could easily go for something like:
"Primo Plus" AMD Sempron 64 2800 1.6GHz DDR System (FS-006-AS)
A compact PC system that packs a mighty punch, the Primo Plus AMD Sempron 64 2800 1.6GHz is built around the popular Asus Vintage-AE1 DDR Desktop Barebones System. Providing more performance than most people will ever need the Primo is ideal for home or office use. Whilst the price is low the Primo uses only the very best hardware.
- AMD Sempron 64 2800 1.6GHz Retail CPU with 256KB L2 Cache
- AMD Sempron Approved Heatsink
- 512MB OcUK PC3200 DDR Memory
- Western Digital 80GB 8MB Cache Serial ATA Hard Drive
- Sony DVD-ROM Drive
- 3 1/2 Inch Floppy Drive
- On-Board 2D/3D Graphics
- On-Board AC''97 Audio
- Integrated 10/100Mbps LAN
- 250W PSU
The Primo can be supplied assembled with or without your choice of installed operating system but is supplied without keyboard, mouse, speakers or monitor (all of which are available elsewhere in this on-line store). The operating system prices listed below are in addition to the system price.
Price: £194.95 (£229.07 Including VAT at 17.5%)