I was going to recommend the rambo fly buster rug with vamoose but quite expensive! I also really like the masta fly rugs, think they cover them really well and not too pricey
I have a derby house's own fly rug...think it was £29.99 and i liked it so much i bought another it was really generous in the neck which was great for my chunky monkey.I did have a masta but found it wasnt very deep in the body.
Having a horse with sweet itch I'm a fan of the rugs with ears (like the rambo hoodie) as I found the bugs still got down the necks of other rugs- brands other than rambo have started copying the design and some of these are very reasonable price wise- I know derby house does some, think weatherbeeta and/or shires may do one now, and I've bought the hydrophane ones for the last few years.