SSD are falling in price. In February 20120 purchased a OCZ 120GB Agility 3 for MacBook for £115 and is brilliant. Am looking at a 240GB soon for my PC DEsktop but will wait a month or two for prices to hopefully stabilise.
Made a big difference to the performance of machine even though the motherboard supports SATA II.
Have read negative reviews about Kingston, dont know about Sandisk.