Why do you want/need an SSD? For the tasks you mention it seems complete overkill.
Acer Aspire 6930 - £449
* Intel Core 2 Duo T6400 dual core processor.
* 2.0GHz processor speed.
* 2MB cache.
* 4GB DDR2 RAM.
* 250GB SATA hard drive capacity.
* DVD-RW/+RW drive.
* 16in HD widescreen.
* Resolution 1366 x 768 pixels.
* nVidia GeForce 9600M GT graphics card with 1GB graphics memory.
* 1 Ethernet port.
* Wireless/Wi-Fi enabled - b/g/n.
* 3 USB ports.
* 1 HDMI port.
* 5 in 1 media card reader - media card compatibility: Secure Digital (SD), Memory Stick (MS), , xD picture card (xD), Multi Media Card (MMC).
* Integrated 0.3MP webcam.
Sell the 250gb HDD and put it towards an SSD, the problem is even a 128gb ssd is about £160+.
Edit:
Acer Aspire 7535G Laptop
Turion ZM-82
4GB RAM
500GB HDD
17.3" WXGA
ATI Mobility Radeon HD4570
DVDRW
Webcam
Vista Home Premium
£479.99