I can spent for Surface around 1100 euro, what is best choice 1) new Surface Pro 4 i5-6300u 4gb 128gb - from microsoft store 1099euro 1b) new Surface Pro 4 m3 4gb 128gb - from microsoft store 999euro or 2) use Surface Pro 3 i5-4300u 4gb 128gb - ebay from 799euro (only with acadapter) up to 850euro (with keyboard pen acadapter) 3) use Surface Pro 3 i5-4300u 8gb 256gb - ebay from 900euro/999euro (only with acadapter) 4) use Surface Pro 3 i7-4550u 8gb 256gb - ebay for 1090euro (only with acadapter) 5) use Surface Pro 3 i7-4650u 8gb 256gb - ebay for 1099euro (pen and acadapter) I will be use device for photoshop, dreamweaver, office and very light gaming (diablo3,starcraft2,heroesofthestorm,overwatch,gta5,battlefield4) but main is work. When I look on all parametres wihtout gpu so best choice is maybe use sp3 i7 from ebay, but I read that i7 have in sp3 very big problems with throthling. And when I look on it only eyes gpu power, so best choice is new sp4 because have it HD520 (I mean versus HD4400, maybe if i7 in sp3 havent problems with throtling so is it better because have it 40cores versus 24 in hd520. But what I read on internet so i7 have realy big problems with throtling) Only one thing what is strange, HD5000 aka Iris have 40cores and HD520 only 24cores but on notebookcheck in benchmark gaming list is hd520 on 290.place and hd5000 on 321.place - hm maybe skylake 24cores have more power than haswell 40cores Or save money and buy use sp3 with i5 4gb? ..ah hard choice..