>>96503317
"Lost Fleet" is kinda that. Combat is absolutely brutal, with ships going at a good chunk of the speed of light and wrecking each other with kinetic and energy weapons.
>>96509359
Personally I was always more of a fan of how Crest of the Stars presents space combat. Author is also more of an autist than LoGH one - he actually made a whole artificial language for his books and carefully crafted all the tech. The only really impossible thing is FTL drive if I remember right. Every other weapon and technology is at least theoretically possible.