The orange terror bass 1000 is a beast and sounds great (like an orange). Tube preamp with a class D SS output section. It's a smidge bigger than a lunchbox head.
Discontinued, but they can still be had used for a decent price. For all tube stuff, I just had a peavey vb-3 that was ridiculous. 300 watts, (8 x el34s) it's bigger, but only weighs 35 pounds. Waaayy lighter than an svt and same amount of juice with more features. Once I got it working, it sounded awesome. Expensive tho.