question on a new cab

im upgrading this christmas to a Gallien Krueger 400RB mk IV, and im having a little trouble deciding on a cab to accompany it. By the way, im looking to only spend about 300. So I thought i was set on the 300 dollar gallien krueger BLX 410, but then i heard that it does not do well in the low end department, which is where most of my style is im pretty sure.

im in a pretty heavy post hardcore band, and im not sure if this cab is the right choice. Any good solid cabs that thrive on the low end and are within my price range?

thanks a ton