If my main goal is to lose fat, but I also want to lift, how much should I eat? (pics)

I'm male, 27, 5'10" 155 pounds. My main goal is fat loss, I'd say I have about 10 pounds of fat left that I'd like to lose basically all in a ring around my abdomen (already down 25 lbs in the last 6 months) but I also want to lift and would like to build a bit of muscle. Ideally I'd like a Brad Pitt fight club kind of lean but strong look.

I'm worried if I'm on too high a calorie deficit I'll go backwards in terms of muscle as I won't have enough calories to recover, but I don't want to eat too much and not lose (or put on) the fat.

The weight I've lost so far is from being on keto but it's been getting harder to stick to lately (I've been eating more). What should I do?

Thanks

current pics http://imgur.com/a/F2LNs#0