Hi Amy,

It also worth considering rollers. I went for a set of rollers over a turbo trainer for a couple of reasons:
– more engaging, given it better simulates riding on the road
– trainers aren’t the best thing for your frame

I bought a set with variable resistance (http://www.wiggle.com.au/elite-arion-mag-parabolic-resistance-rollers/?utm_source=pla&utm_medium=base&utm_campaign=au) and on high resistance its tough.