I didn't find the bass to be much of a problem with HS50M. If you place them close to wall and carefully find a place where they sound the most consistent in bass area, you're going to be ok.
As I pointed out many times here on GS. HS50M have strange highs, grainy and with tendency to sound like sand. Not a great thing to perfect your HF textures (ie. mixing snares, hats, shakers, tamburines...).
They have almost exagerated midrange, that's quite unique for a cheap monitors. I quite liked that.
The bottom is strange, it made almost any beat to sound beefy even when it wasn't. That was big
.
Dunno, I can't recommend them. Not if they're going to be the only monitors you'll have for a long time. If you want to go cheap, try old red Tannoy Reveals, with a good amp, they were the cheapest system that actually sounded ok to my ears (though with bad amp they can sound like shit too). Then maybe adam A7, but the lowest adams that I've heard were P11A which I liked.