I agree with geofelt. For most consumers there will not be very much of a performance difference between modern 3rd generation SATA 3, 6Gb/s ssd's. A user would have to be doing some type of complicated scientific or professional work to notice a performance difference.
I recommend the new Crucial BX100 entry level SATA 3, 6Gb/s solid state drive. Technical reviews are favorable. The Crucial BX100 performs a little better and has a few more features than the Kingston or PNY entry level ssd's. This morning newegg, a popular online retailer in the USA, has the 250GB BX100 listed in the daily deals section for $99.99:
http://www.newegg.com/DailyDeal.aspx?Page=5
I understand that you are not in the USA and that prices can be different in other countries. Quite often prices are higher. That is unfortunate.
I maintain the ssd database listed in a sticky at the very top of this forum section. Here is the link:
http://www.johnnylucky.org/data-storage/ssd-database.html
Scroll down to the SATA 3 ssd section and look for the Crucial BX100 or any other ssd you might be interested in and follow the links to the technical reviews. Last year I started adding links to technical reviews in languages other than English. Temporarily there are only a few technical reviews for the BX100 in languages other than English. I will add more reviews in a variety of languages when they are published.