I started developing my first Android game for mobile phones and tablets. I currently testing it with my Samsung Galaxy Y phone. Problem is that I do not have any idea how my game behaves on phones and tablets with higher resolutions (Galaxy Y resolution is 320 x 240). Now I'm going to buy some new (or used) devices but another problem is the lack of money. I'm able to invest in only one phone and one tablet. There are a huge number of different devices. What would be the best bet for developing purposes if you want to be pretty sure the game runs ok on majority of devices?