Working with intervals and other structured trainer session such as spinnervals and sufferfest will help the time pass while getting you a definite benefit to doing the work. Just getting on the trainer and ticking over the miles/time will get boring very quickly and won't really net you too much if any benefit.

I have a Kurt Kinetic and also some rollers that I use for training and moreso over our last winter which is just ending. My stuff is track focussed, so a little different, but I find it very hard to concentrate on sticking to the specific structure of my roller session as I also focus on purely keeping upright. It didn't take me too long to get the feel for the rollers, but I have a routing that gets me spinning at up to 130rpm for a minute, by working up in steps. I find it really hard to keep the focus on just staying on the rollers while also paying attention to keeping my rpm steady and high.

If you can, try some rollers and see how you go. Adjustable resistance rollers would be neat, but I would be very hesitant if you haven't used rollers before. A mag or fluid trainer would be the best bet, and unless you have specific reasons to get a higher end one, a lower spec model that is cheaper should suit most people's needs.