Have you considered a Portuguese Podengo??? I think they my fit what you want and they have 3 distinct sizes to choose from, pequeno (small), medio (mudieum) and grande (large). I think the medio would suit you well and I can forward you to someone who would be able to help you out for sure! They are a sighthound and aren't too common yet but there is a good population of medios going on in the US. Same with pequenos but the Grandes are very hard to come across.