Help me pick a gear for my combo

I agree, from what little I have got to drive it.....the thing takes off like a rocket and pulls really hard. but it sounds like at higher speeds I am going to be running really high in the rpm's and I dont want to put my engine through constant high rpm's or for it to eat through gas like a pig. but at the same time I dont want to lose that seat of the pants performance. so I am hoping maybe someone can recommend something that they think would be good with my combo and that would be a happy medium.