I'm looking forward to the new non-powered experience, and am curious as to whether aerotow or winch launches would be better value for money (I understand winch launches are cheaper). What are the pros/cons of each??
You're just starting out, so I think that you first few flights should be aerotows. I've taught students on their early flights, and a winter winch launch (though exciting) doesn't give enough time in the air for you have more than a couple of minutes controlling the aircraft before the instructor has to take over for circuit and landing. Even though you've flown before, the handling is quite different and so I'd recommend a couple of aerotows to get your hand in.
All this changes if you are winching on to a ridge - if the ridge is working, hours of flight are possible.
Once you can handle the aircraft, then winching is probably best for most of your flights. You need to learn circuits and landing in an aircraft without the option to go around, and the winch is most cost effective for that.
When you move on to spinning, you'll need to aerotow again.
However, your instructor will be best placed to advise you - when I was learning (which I did in the winter) I was discouraged from taking too many aerotows because they were not cost-effective for what I needed to learn. It's not just a matter of money, but also time. On the short winter days it's usually poor light which stops play, and a club can get in at least twice as many winch launches as aerotows per aircraft.
In conclusion, first couple of flights aerotow, then take the instructor's advice (which will probably be mainly to winch).