Once you have your Phone Line and asked for ADSL and got it depending what you are going to do with your ADSL I would suggest going for the 49YTL per month as its unlimited and the connection is around 1meg when everything work's right, you may want to get your modem from the UK as they are cheaper and if you can get a WIFI modem just in case you have a laptop and want to use it anywhere in your house or out side.
Over the last few weeks the net is not very good going down then coming back on, so just give it a try at the moment TTNET have up to 4meg connection but that is expensive. Enjoy ADSL in UZUMLU.