A 3/8 torque wrench is a good idea for manifolds and small accessories like water pumps if you are not confident working by feel. Kincrome and Toledo would be much the same if selling around the same price.
Most people buy the 1/2 inch version but they are only really good for suspension and wheel nuts as they are not very accurate for the low torque specs needed for smaller nuts and bolts.
And buy a decent size decent quality tool kit with both metric and AF sizes in both sockets and spanners. Even then you will still need more. You will regret being a tight ass and trying to work on the car with a 20 dollar throw away set.
Have a look at TTI, bahco, Repco ( the proper Repco brand not their cheapo sets) gear wrench, kincrome, sidcrome or some of the stanley sets in the yellow metal boxes. You can find them on sale sometimes.