The Sekai will be lighter and faster than most (all?) hybrids you will find for $400 and will ride more like your Trek 2.1 due to the drop bars, narrower tires and sportier geometry. The Sekai 4000 was second to the top of the line for Sekai. The Sekai has downtime mounted shifters which will be a little different for you, and the riding position will be a little more relaxed than your current Trek. The Sekai 4000 is very similar to a Raleigh International; designed as a versatile 'club racer' type bike that could be raced on week ends and ridden to work during the week or used as a light touring bike.
The Sekai is ready to ride. It has newer tires, brake pads, cables, sealed bottom bracket and has been tuned up. The only thing you would need to do is adjust the seat and handlebars to suit you.