well if you want to record something into your DAW, you'll need a device that digitalizes your bass. You can either buy an interface. They have often pre-amps built in and digital and analog out/inputs. Or the more high end version would be to buy a single pre amp, which is connected to the input of a ADC (Analog-Digital-Converter). Those babies are often connected trough some kind of digital connection. (Aes-Ebu, Spdif, Adat...). So if you go for that, you'll need an digital interface which understands one of the mentioned digital formats. Often they are hooked up via PCi to your computer.
treating a room-->acoustic treating. alter your room with absorbers, diffusors and what not so the room is as "linear" as possible. Cause the monitors sound will be reflected from walls, floor/ceiling and objects in the room. Which causes a not wanted change in the sonic picture.(its pretty sophisticated to treat a room properly, if you want to get into that either read some books about it, hire a professional or take a deep look into the studio building/acoustics department here in GS)
A few names to look at?
well that really just depends on your budged but I'm going to throw some names at you:
Monitors low budged:
-HS series from yamaha
Most mentioned manufacturers have a bigger range of speakers. So "my categorization" isnt completely correct. (adam&genelec for example has pretty high-endish speakers to, as well as dynaudio(just depends on the series/modell) , neumann has monitors I would put into the medium section and so on)
the listed brands are in no particular order.
And just to clear it up:
You can always buy something cheaper or more expensive. (My list is by FAR not complete)
hope I could help.