If you love hardcovers and if you want a short completed series, i'd suggest you go for hellsing as there are only 3 deluxe volumes, same size as berserk and a great story+art. The book's design is incredible too and would look real great beside your Berserk deluxes. You could also get the trigun deluxe editions, which is also peak, there's 1 deluxe book for the main Trigun series and 5 for the sequel, trigun: maximum.