i guess it depends where you live. if alaska, i would say computrainer and can understand that you think winter is right around the corner. the winter of winter makes me cringe… hello phoenix, here i come:-)
i live in CT so weather isn’t the primary driver right now but if i am going to buy one tool i would like to be able to use it year round. (I regularly train indoors on my trainer anyway…)
If you don’t mind training indoors, and are already expecting to. I think the Computrainer is the tool for you. I am assuming you are going to base your (winter) training on power. While it’d be nice to have power on the road, I think that it would be more ‘training WITH power’ as opposed to ‘training BY power’. Being able to program the CT for specific wattage levels and time intervals though the coaching software and 3rd party software like ERG+ is the way to go. Outside, it is very hard for most people to find the roads/terrain necessary to perform specific intervals at specific power levels.