Noob Hartke question - LH vs. HA series

[Largestal]

I have searched TB forums, read Hartke's web site and am still confused as to the difference between these two amp series. Wanting to power a Fender Rumble 100 (4 x 10, 4 ohm) and am needing some clarifications/suggestions as not only which series, but which amp.
Cab is 500w suggested/1000w max so I am wondering if the HA3500 will have enough headroom or should I bump on up to the HA5500. Also where does the LH 500 fall into this mix.

Been looking at Genz as well, but impressed with Mr. Hartke's involvement in TB forums. Speaks well of his company and character.

Thanks