The MF Launch Box fills the 'under $100 electric' niche very well, although it's mainly for portable use. At your upper range of about $150, there are quite a few nice box vapes, although I'd avoid the ones with digital displays. Digital in this price range doesn't get you much except 'made in China' boxes with no warranty and a high failure rate. Take a look at the box models sold by Vaporstore, Vapenow, and Gotvape. Their analog models are all good ones.

Personally, I'd go for the Da Buddha (DBV) from 7th Floor. You get the same guts as the $250 SSV with a nice carry/storage bag and hands free design. Much nicer than a lightweight box IMO. Vapenow has it for $159 w/free shipping.